Merge pull request #2116 from Sonicadvance1/fix_exception_handler_crash

Fix a crash with fastmem disabled.

Source/Core/Core/Core.cpp

@@ -337,7 +337,8 @@ static void CpuThread()
 	if (!_CoreParameter.bCPUThread)
 		g_video_backend->Video_Cleanup();
 
-	EMM::UninstallExceptionHandler();
+	if (_CoreParameter.bFastmem)
+		EMM::UninstallExceptionHandler();
 
 	return;
 }