Abort loading states from incompatible graphics backends.

Source/Core/VideoCommon/Src/MainBase.cpp

@@ -186,6 +186,11 @@ void VideoBackendHardware::InitializeShared()
 // Run from the CPU thread
 void VideoBackendHardware::DoState(PointerWrap& p)
 {
+	bool software = false;
+	p.Do(software);
+	if (p.GetMode() == PointerWrap::MODE_READ && software == true)
+		// change mode to abort load of incompatible save state.
+		p.SetMode(PointerWrap::MODE_VERIFY);
 	VideoCommon_DoState(p);
 	p.DoMarker("VideoCommon");