Fix autostaging on shutdown engines

Shutdown engines need to get autostaged through in order to avoid
having TF failed engines prevent autostaging.

Signed-off-by: Lamont Granquist <lamont@scriptkiddie.org>

MechJeb2/PartExtensions.cs

@@ -48,8 +48,8 @@ public static bool EngineHasFuel(this Part p)
             {
                 PartModule m = p.Modules[i];
                 ModuleEngines eng = m as ModuleEngines;
-                if (eng != null) return !eng.getFlameoutState;
-
+                if (eng != null)
+                    return !eng.getFlameoutState && !eng.engineShutdown;
             }
             return false;
         }