Ensure the buffer is NULL-terminated before converting it.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@26297 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/stc/stc.cpp

@@ -2547,8 +2547,9 @@ bool wxStyledTextCtrl::LoadFile(const wxString& filename)
         if (len > 0)
         {
 #if wxUSE_UNICODE
-            wxMemoryBuffer buffer(len);
+            wxMemoryBuffer buffer(len+1);
             success = (file.Read(buffer.GetData(), len) == len);
+            ((char*)buffer.GetData())[len] = 0;
             contents = wxString(buffer, *wxConvCurrent);
 #else
             wxString buffer;