Remove apostrophes from instances of possessive "its".

I noticed one instance of this while looking at the code the other day,
and after a quick grep, realized it happened a *lot*!  One of the many
frustrating things about the English language is that we use apostrophes
to make pretty much everything possessive *except* the pronoun "it".
In that case, we use "its".  "It's" is reserved for the contraction
meaning "it is" or "it has".

src/actions.c

@@ -577,7 +577,7 @@ void handleMaximize(WWindow *wwin, int directions)
 	 * corners) and only when requested state is also half maximized, but on
 	 * opposite side of the screen. As for corners, it is similar, but
 	 * expected is that only quarter maximized windows on corner can change
-	 * it's state to half maximized window, depending on direction. Note, that
+	 * its state to half maximized window, depending on direction. Note, that
 	 * MAX_KEYBOARD is passed to the wMaximizeWindow function, to preserve the
 	 * head, even if mouse was used for triggering the action. */
 

src/defaults.c

@@ -2074,7 +2074,7 @@ getWSSpecificBackground(WScreen * scr, WDefaultEntry * entry, WMPropList * value
 	 * Kluge to force wmsetbg helper to set the default background.
 	 * If the WorkspaceSpecificBack is changed once wmaker has started,
 	 * the WorkspaceBack won't be sent to the helper, unless the user
-	 * changes it's value too. So, we must force this by removing the
+	 * changes its value too. So, we must force this by removing the
 	 * value from the defaults DB.
 	 */
 	if (!scr->flags.backimage_helper_launched && !scr->flags.startup) {

src/dock.c

@@ -2628,7 +2628,7 @@ Bool wDockSnapIcon(WDock *dock, WAppIcon *icon, int req_x, int req_y, int *ret_x
 				continue;
 			for (i = 0; i < tmp->max_icons; i++) {
 				nicon = tmp->icon_array[i];
-				if (nicon && nicon != icon &&	/* Icon can't be it's own neighbour */
+				if (nicon && nicon != icon &&	/* Icon can't be its own neighbour */
 				    (abs(nicon->xindex - ex_x) <= CLIP_ATTACH_VICINITY &&
 				     abs(nicon->yindex - ex_y) <= CLIP_ATTACH_VICINITY)) {
 					neighbours = 1;

src/menu.c

@@ -1994,7 +1994,7 @@ static void menuMouseDown(WObjDescriptor * desc, XEvent * event)
 				wusleep(MENU_BLINK_DELAY);
 			}
 #endif
-			/* unmap the menu, it's parents and call the callback */
+			/* unmap the menu, its parents and call the callback */
 			if (!menu->flags.buttoned && (!menu->flags.app_menu || menu->parent != NULL)) {
 				closeCascade(menu);
 			} else {
@@ -2234,7 +2234,7 @@ static void menuTitleMouseDown(WCoreWindow * sender, void *data, XEvent * event)
  * closed when the button is clicked.
  *
  * Side effects:
- * 	The closed menu is reinserted at it's parent menus
+ * 	The closed menu is reinserted at its parent menus
  * cascade list.
  *----------------------------------------------------------------------
  */

src/menu.h

@@ -64,7 +64,7 @@ typedef struct WMenu {
 	int frame_x, frame_y;	       /* position of the frame in root*/
 
 	WMenuEntry **entries;	       /* array of entries. This is shared
-					* by the menu and it's "brother" */
+					* by the menu and its "brother" */
 	short alloced_entries;	       /* number of entries allocated in
 					* entry array */
 	struct WMenu **cascades;	       /* array of cascades */

src/screen.h

@@ -57,7 +57,7 @@ typedef struct WDrawerChain {
 } WDrawerChain;
 
 /*
- * each WScreen is saved into a context associated with it's root window
+ * each WScreen is saved into a context associated with its root window
  */
 typedef struct _WScreen {
     int	screen;			       /* screen number */

src/stacking.c

@@ -336,7 +336,7 @@ void wLowerFrame(WCoreWindow * frame)
 		if (owner != wlist) {
 			while (wlist->stacking->under) {
 				/* if this is a transient, it should not be placed under
-				 * it's owner */
+				 * its owner */
 				if (owner == wlist->stacking->under)
 					break;
 				wlist = wlist->stacking->under;
@@ -391,7 +391,7 @@ void wLowerFrame(WCoreWindow * frame)
  * 	None
  *
  * Side effects:
- * 	The frame is added to it's screen's window list.
+ * 	The frame is added to its screen's window list.
  *----------------------------------------------------------------------
  */
 void AddToStackList(WCoreWindow * frame)

src/switchmenu.c

@@ -190,7 +190,7 @@ void UpdateSwitchMenu(WScreen * scr, WWindow * wwin, int action)
 	 *    1.  When a window is created.
 	 *    2.  When a window is destroyed.
 	 *
-	 *    3.  When a window changes it's title.
+	 *    3.  When a window changes its title.
 	 *    4.  When a window changes its workspace.
 	 */
 	if (action == ACTION_ADD) {

src/window.h

@@ -173,7 +173,7 @@ typedef struct WFakeGroupLeader {
 
 
 /*
- * Stores client window information. Each client window has it's
+ * Stores client window information. Each client window has its
  * structure created when it's being first mapped.
  */
 typedef struct WWindow {

src/winspector.c

@@ -70,7 +70,7 @@ static const struct {
 	{ "NoTitlebar", { .no_titlebar = 1 }, N_("Disable titlebar"),
 	  N_("Remove the titlebar of this window.\n"
 	     "To access the window commands menu of a window\n"
-	     "without it's titlebar, press Control+Esc (or the\n"
+	     "without its titlebar, press Control+Esc (or the\n"
 	     "equivalent shortcut, if you changed the default\n"
 	     "settings).") },