fixed wxString::resize() which was completely broken

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@12272 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/string.cpp

@@ -1632,7 +1632,7 @@ void wxString::resize(size_t nSize, wxChar ch)
     }
     else if ( nSize > len )
     {
-        *this += wxString(ch, len - nSize);
+        *this += wxString(ch, nSize - len);
     }
     //else: we have exactly the specified length, nothing to do
 }