fixed crasher

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@43183 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

diff --git a/src/aui/framemanager.cpp b/src/aui/framemanager.cpp
index bf0138345d6dfadae89dac5c57bc4cb6bef746e6..0ebfccaf038084e54fcc727b0cd5465b7ef25348 100644 (file)
--- a/src/aui/framemanager.cpp
+++ b/src/aui/framemanager.cpp
@@ -3534,10 +3534,12 @@ void wxAuiManager::OnSetCursor(wxSetCursorEvent& event)
 
 
 void wxAuiManager::UpdateButtonOnScreen(wxAuiDockUIPart* button_ui_part,
-                                          const wxMouseEvent& event)
+                                        const wxMouseEvent& event)
 {
     wxAuiDockUIPart* hit_test = HitTest(event.GetX(), event.GetY());
-
+    if (!hit_test)
+        return;
+        
     int state = wxAUI_BUTTON_STATE_NORMAL;
 
     if (hit_test == button_ui_part)