Make sure NickView::customEvent() has a valid model

We've gotten backtraces that indicate crashes in this method, and all that I can
see could be wrong is an invalid model() pointer. Can't really explain that for now,
but let's introduce a check just to make sure.

diff --git a/src/uisupport/nickview.cpp b/src/uisupport/nickview.cpp
index 6d3f398..11b40c7 100644 (file)
--- a/src/uisupport/nickview.cpp
+++ b/src/uisupport/nickview.cpp
@@ -144,6 +144,9 @@ void NickView::customEvent(QEvent *event) {
   if(event->type() != QEvent::User)
     return;
 
+  if(!model())
+    return;
+
   QModelIndex topLevelIdx;
   for(int i = 0; i < model()->rowCount(rootIndex()); i++) {
     topLevelIdx = model()->index(i, 0, rootIndex());