render characters on OSX one by one as fractional widths leads to errors otherwise

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@64040 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

samples/caret/caret.cpp

@@ -424,10 +424,17 @@ void MyCanvas::OnPaint( wxPaintEvent &WXUNUSED(event) )
             wxChar ch = CharAt(x, y);
             if ( !ch )
                 ch = wxT(' ');
+#ifdef __WXOSX__
+            dc.DrawText(ch, m_xMargin + x * m_widthChar,
+                        m_yMargin + y * m_heightChar );
+#else
             line += ch;
+#endif
         }
 
+#ifndef __WXOSX__
         dc.DrawText( line, m_xMargin, m_yMargin + y * m_heightChar );
+#endif
     }
 }