Correct stopping of Core in OSX via Command+Q, and fix a thread from not dying when stopping with CoreAudio

git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@5013 8ced0084-cf51-0410-be5f-012b33b47a6e

Source/Core/DolphinWX/Src/MainNoGUI.cpp

@@ -188,7 +188,7 @@ int main(int argc, char *argv[])
 		event = [NSApp nextEventMatchingMask:NSAnyEventMask untilDate:[NSDate distantPast] inMode:NSDefaultRunLoopMode dequeue:YES ];
 		if(cocoaSendEvent(event))
 		{
-			PowerPC::Shutdown();
+			Core::Stop();
 			break;
 		}
 	}