removed strange bit flipping under wxGTK when saving TIFFs

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@32468 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/imagtiff.cpp

@@ -423,13 +423,7 @@ bool wxTIFFHandler::SaveFile( wxImage *image, wxOutputStream& stream, bool verbo
                         bitmask <<= 1;
                     }
 
-                    // FIXME: what's this??
-#ifdef __WXGTK__
-                    buf[column]=~reverse;
-
-#else
                     buf[column] = reverse;
-#endif
                 }
             }
         }