clear window workmask when queuing up window for destruction. All callbacks (except destroy) are removed from the window already anyway. This fixes a problem where a newly created window that is immediately destroyed again causes an error-exit because it is still being inited and at that point it is found that no display callback has been set, which is an error.

git-svn-id: https://svn.code.sf.net/p/freeglut/code/trunk@1837 7f0cb862-5218-0410-a997-914c9d46530a

freeglut/freeglut/src/fg_structure.c

@@ -182,6 +182,11 @@ void fgAddToWindowDestroyList( SFG_Window* window )
         fghClearCallBacks( window );
         SET_WCB( *window, Destroy, destroy, destroyData );
     }
+
+	/*
+	 * Similarly, clear all work set for the window, none of this has to be executed anymore
+	 */
+	window->State.WorkMask = 0;
 }
 
 /*