Fix [ 1574240 ] wx.RadioButton doesn't navigate correctly

[wxWidgets.git] / src / common / string.cpp

diff --git a/src/common/string.cpp b/src/common/string.cpp
index 5770917d5f233a444eca744daffff459b629ac23..c2bab603e26cf52cb7844689add9f9fdfc078df7 100644 (file)
--- a/src/common/string.cpp
+++ b/src/common/string.cpp
@@ -174,8 +174,16 @@ void wxStringBase::InitWith(const wxChar *psz, size_t nPos, size_t nLength)
 // poor man's iterators are "void *" pointers
 wxStringBase::wxStringBase(const void *pStart, const void *pEnd)
 {
-  InitWith((const wxChar *)pStart, 0,
-           (const wxChar *)pEnd - (const wxChar *)pStart);
+  if ( pEnd >= pStart )
+  {
+    InitWith((const wxChar *)pStart, 0,
+             (const wxChar *)pEnd - (const wxChar *)pStart);
+  }
+  else
+  {
+    wxFAIL_MSG( _T("pStart is not before pEnd") );
+    Init();
+  }
 }
 
 wxStringBase::wxStringBase(size_type n, wxChar ch)