Added workaround for current stability problems of the app_server: giant lock,

say hello to RootLayer.
Adi will probably not like this, but that's definitely only a temporary solution :-)
This little fix greatly increases app_server stability under Haiku - ie. menus
are working now, the team monitor comes up regularly, etc. - how great is that?


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@13305 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/servers/app/ServerWindow.cpp

@@ -401,6 +401,7 @@ ServerWindow::_DispatchMessage(int32 code, BPrivate::LinkReceiver &link)
 	}
 
 	RootLayer *myRootLayer = fWinBorder->GetRootLayer();
+	myRootLayer->Lock();
 
 	switch (code) {
 		//--------- BView Messages -----------------
@@ -1456,6 +1457,8 @@ myRootLayer->Unlock();
 			_DispatchGraphicsMessage(code, link);
 			break;
 	}
+
+	myRootLayer->Unlock();
 }
 
 		// -------------------- Graphics messages ----------------------------------