Another fix for the no-toolkit build

This should be better in the long run.
* oldXMenu/Activate.c (XMenuActivate): Revert previous change,
eliminating the goto it introduced.
* oldXMenu/XMenuInt.h: Include <attribute.h>, for FALLTHROUGH.

oldXMenu/Activate.c

@@ -615,8 +615,8 @@ XMenuActivate(
 						   event.xbutton.window
 						   );
 		if (event_xmp != NULL) continue;
-
-	queue:
+		FALLTHROUGH;
+	    default:
 		/*
 		 * This is a foreign event.
 		 * Queue it for later return to the X event queue.
@@ -629,9 +629,6 @@ XMenuActivate(
 		feq_tmp->event = event;
 		feq_tmp->next = feq;
 		feq = feq_tmp;
-		break;
-	    default:
-		goto queue;
 	    }
     }
     /*

oldXMenu/XMenuInt.h

@@ -37,6 +37,8 @@ without express or implied warranty.
 
 #include <config.h>
 
+#include <attribute.h>
+
 /* Avoid warnings about redefining NULL by including <stdio.h> first;
    the other file which wants to define it (<stddef.h> on Ultrix
    systems) can deal if NULL is already defined, but <stdio.h> can't.  */