Showing bundle menu with no status bar would cause infinite loop

This is because we were forwarding the message to ‘nil’ rather than the status bar, and ‘nil’ here would be first responder, i.e. ourself.

Fixes textmate/bugs#17

Frameworks/OakTextView/src/OakDocumentView.mm

@@ -630,6 +630,9 @@ private:
 
 - (void)showBundlesMenu:(id)sender
 {
+	if(!self.statusBar)
+		return NSBeep();
+
 	[NSApp sendAction:_cmd to:self.statusBar from:self];
 }