Fix possible crash if no model is set

When updating the siblings-information by e.g. a call to
setSupportsItemExpanding() it is possible that the model is not
set yet.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/kitemviews/kitemlistview.cpp b/src/kitemviews/kitemlistview.cpp
index 372726954..907bf624d 100644
--- a/src/kitemviews/kitemlistview.cpp
+++ b/src/kitemviews/kitemlistview.cpp
@@ -2057,7 +2057,7 @@ void KItemListView::updateGroupHeaderHeight()
 
 void KItemListView::updateSiblingsInformation(int firstIndex, int lastIndex)
 {
-    if (!supportsItemExpanding()) {
+    if (!supportsItemExpanding() || !m_model) {
         return;
     }