Now drops into the debugger if the window/looper is still locked in task_looper().

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@13480 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/kits/interface/Window.cpp

@@ -2140,6 +2140,9 @@ BWindow::task_looper()
 	//	Unlock the looper
 	Unlock();
 
+	if (IsLocked())
+		debugger("window must not be locked!");
+
 	//	loop: As long as we are not terminating.
 	while (!fTerminating) {
 		// TODO: timeout determination algo