UNC fix to directory path

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@16001 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/msw/filedlg.cpp

@@ -310,8 +310,11 @@ int wxFileDialog::ShowModal()
                     if ( chNext != _T('\\') && chNext != _T('/') )
                         break;
 
-                    // ignore the next one
+                    // ignore the next one, unless it is at the start of a UNC path
+                    if (i > 0)
                         i++;
+                    else
+                        break;    
                 }
                 // fall through