fix the update session operator=, temporarily enabled Flush()ing the underlying BView again in order to not distract with fake drawing bugs

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@15252 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/tests/servers/app/newerClipping/DrawingEngine.cpp

@@ -37,7 +37,10 @@ DrawingEngine::Unlock()
 #if RUN_WITH_FRAME_BUFFER
 	Sync();
 #else
-//	Flush();
+// Flush() takes some time, but we
+// need to do that, since we draw
+// at any time, outside actual updates
+	Flush();
 #endif
 	Window()->Unlock();
 }

src/tests/servers/app/newerClipping/WindowLayer.cpp

@@ -778,6 +778,7 @@ UpdateSession&
 UpdateSession::operator=(const UpdateSession& other)
 {
 	fDirtyRegion = other.fDirtyRegion;
+	fInUse = other.fInUse;
 }