Probable fix for [ 1933745 ] Crash in wxDataViewHeaderWindowBase::GetColumn()

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@53022 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

diff --git a/src/generic/datavgen.cpp b/src/generic/datavgen.cpp
index 9440be62406cf1331cc1a9ec2329427a2de693d5..95231257c6d1d3cd543bb29011a969cf7e59c1a3 100644 (file)
--- a/src/generic/datavgen.cpp
+++ b/src/generic/datavgen.cpp
@@ -1464,7 +1464,7 @@ bool wxDataViewHeaderWindowMSW::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARA
 
         case HDN_BEGINDRAG:
             // user has started to reorder a column
-            if (!GetColumn(nmHDR->iItem)->IsReorderable())
+            if ((nmHDR->iItem != -1) && (!GetColumn(nmHDR->iItem)->IsReorderable()))
             {
                 // veto it!
                 *result = TRUE;