[Plugin Loader] Unregister loader callback

This callback should be unregistered when plugin loading completes,
otherwise we could end up processing bundles loaded by external stuff,
like Audio Units loading for MIDI playback.

Signed-off-by: Christopher Snowhill <kode54@gmail.com>

Audio/PluginController.mm

@@ -196,6 +196,9 @@ static PluginController *sharedPluginController = nil;
 		[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(bundleDidLoad:) name:NSBundleDidLoadNotification object:nil];
 
 		[self loadPlugins];
+
+		[[NSNotificationCenter defaultCenter] removeObserver:self name:NSBundleDidLoadNotification object:nil];
+
 		[self printPluginInfo];
 	}
 }