WINGs: Marked args as unused for compiler in WINGs API code

There are a few function in WING's API that take parameter for consistency
reason and for possible future evolution, but actually do not need the
argument.

As they are case we know about, this patch adds the appropriate stuff to
tell the compiler we are ok with this to avoid a false report.

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

WINGs/wmenuitem.c

@@ -33,6 +33,9 @@ WMMenuItem *WMGetSeparatorMenuItem(void)
 
 Bool WMMenuItemIsSeparator(WMMenuItem * item)
 {
+	/* Parameter not used, but tell the compiler that it is ok */
+	(void) item;
+
 	return False;
 }
 

WINGs/wtext.c

@@ -3473,6 +3473,10 @@ static void destroyWidget(WMWidget * widget)
 void WMDestroyTextBlock(WMText * tPtr, void *vtb)
 {
 	TextBlock *tb = (TextBlock *) vtb;
+
+	/* Parameter not used, but tell the compiler that it is ok */
+	(void) tPtr;
+
 	if (!tb)
 		return;