mbstowcs hack for CodeWarrior's MSL

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@1721 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/msw/ole/automtn.cpp

@@ -765,7 +765,11 @@ BasicString::BasicString(const char *sz)
 {
   // get the size of required buffer
   UINT lenAnsi = strlen(sz);
+  #ifdef __MWERKS__
+  UINT lenWide = lenAnsi * 2 ;
+  #else
   UINT lenWide = mbstowcs(NULL, sz, lenAnsi);
+  #endif
 
   if ( lenWide > 0 ) {
     m_wzBuf = new OLECHAR[lenWide + 1];