Index: src_plugins/lib_gtk_common/wt_layersel.c
===================================================================
--- src_plugins/lib_gtk_common/wt_layersel.c	(revision 8740)
+++ src_plugins/lib_gtk_common/wt_layersel.c	(revision 8741)
@@ -249,7 +249,7 @@
 	int n, is_on, normal = 1;
 
 	if (event->type != GDK_BUTTON_PRESS) /* ignore excess events on double or triple buttons */
-		return;
+		return TRUE;
 
 	ls->running = 1;
 	switch(event->button.button) {