BUG: fix for bug#3714 execlude_from_all not working on vs

Source/cmGlobalGenerator.cxx

@@ -984,7 +984,7 @@ bool cmGlobalGenerator::IsExcluded(cmLocalGenerator* root,
       }
     cur = cur->GetParent();
     }
-  return false;
+  return gen->GetExcludeAll();
 }