WPrefs: Marked args as unused for compiler in WINGs callback code

The WINGs toolkit dispatch events on widgets using callbacks, which means
having a fixed argument list for the handling function.

It is then correct to not use all the arguments, so this patch adds the
appropriate stuff to avoid a false report from compiler.

Signed-off-by: Christophe CURIS <christophe.curis@free.fr>

WPrefs.app/Appearance.c

@@ -1213,6 +1213,9 @@ static void paintListItem(WMList * lPtr, int index, Drawable d, char *text, int
 	WMColor *black = WMBlackColor(scr);
 	TextureListItem *titem;
 
+	/* Parameter not used, but tell the compiler that it is ok */
+	(void) text;
+
 	item = WMGetListItem(lPtr, index);
 	titem = (TextureListItem *) item->clientData;
 	if (!titem) {
@@ -1497,6 +1500,9 @@ static void changedTabItem(struct WMTabViewDelegate *self, WMTabView * tabView,
 	_Panel *panel = self->data;
 	int i;
 
+	/* Parameter not used, but tell the compiler that it is ok */
+	(void) tabView;
+
 	i = WMGetTabViewItemIdentifier(item);
 	switch (i) {
 	case 0:

WPrefs.app/Menu.c

@@ -1215,6 +1215,10 @@ menuItemCloned(WEditMenuDelegate * delegate, WEditMenu * menu, WEditMenuItem * o
 	ItemData *data = WGetEditMenuItemData(origItem);
 	ItemData *newData;
 
+	/* Parameter not used, but tell the compiler that it is ok */
+	(void) delegate;
+	(void) menu;
+
 	if (!data)
 		return;
 
@@ -1310,6 +1314,10 @@ static void menuItemDeselected(WEditMenuDelegate * delegate, WEditMenu * menu, W
 {
 	_Panel *panel = (_Panel *) delegate->data;
 
+	/* Parameter not used, but tell the compiler that it is ok */
+	(void) menu;
+	(void) item;
+
 	changeInfoType(panel, NULL, NoInfo);
 }
 
@@ -1318,6 +1326,9 @@ static void menuItemSelected(WEditMenuDelegate * delegate, WEditMenu * menu, WEd
 	ItemData *data = WGetEditMenuItemData(item);
 	_Panel *panel = (_Panel *) delegate->data;
 
+	/* Parameter not used, but tell the compiler that it is ok */
+	(void) menu;
+
 	panel->currentItem = item;
 
 	if (data) {

WPrefs.app/Paths.c

@@ -177,6 +177,9 @@ static void paintItem(WMList * lPtr, int index, Drawable d, char *text, int stat
 	Display *dpy = WMScreenDisplay(scr);
 	WMColor *backColor = (state & WLDSSelected) ? panel->white : panel->gray;
 
+	/* Parameter not used, but tell the compiler that it is ok */
+	(void) index;
+
 	width = rect->size.width;
 	height = rect->size.height;
 	x = rect->pos.x;