Making sure that the 'changed' flag is set on every menu pulldown. (STR #1693)

git-svn-id: file:///fltk/svn/fltk/branches/branch-1.1@5890 ea41ed52-d2ee-0310-a9c1-e6b18d33e121

test/input_choice.cxx

@@ -32,6 +32,10 @@ void buttcb(Fl_Widget*,void*data) {
     flag ^= 1;
     if ( flag ) in->activate();
     else        in->deactivate();
+    if (in->changed()) {
+        printf("Callback: changed() is set\n");
+        in->clear_changed();
+    }
 }
 
 void input_choice_cb(Fl_Widget*,void*data) {