WINGs: Marked args as unused for compiler in widget resize callback code

WINGs dispatches window resize events using callback functions, which
means having a fixed argument list for that 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>

WINGs/wlist.c

@@ -1103,6 +1103,9 @@ static void didResizeList(W_ViewDelegate * self, WMView * view)
 {
 	WMList *lPtr = (WMList *) view->self;
 
+	/* Parameter not used, but tell the compiler that it is ok */
+	(void) self;
+
 	WMResizeWidget(lPtr->vScroller, 1, view->size.height - 2);
 
 	updateDoubleBufferPixmap(lPtr);