Added a sort of hack which allows BPictureButton not to hang the app. Strangely, dereferencing a NULL pointer hangs the app instead of crashing it

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@15793 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/kits/interface/View.cpp

@@ -3026,7 +3026,9 @@ BView::EndPicture()
 		}
 	}
 
-	return NULL;
+	// TODO: Was NULL. We might revert when there is BPictures support
+	// in the app-server. For now this allows to avoid hangs with BPictureButtons
+	return cpicture;
 }