Finally fully remove the safegtk module.

rtgui/flatfield.cc

@@ -19,7 +19,6 @@
 #include "flatfield.h"
 #include "options.h"
 #include "guiutils.h"
-#include "../rtengine/safegtk.h"
 #include <sstream>
 #include "rtimage.h"
 
@@ -140,7 +139,7 @@ void FlatField::read(const rtengine::procparams::ProcParams* pp, const ParamsEdi
         }
     }
 
-    if (safe_file_test (pp->raw.ff_file, Glib::FILE_TEST_EXISTS)) {
+    if (Glib::file_test (pp->raw.ff_file, Glib::FILE_TEST_EXISTS)) {
         flatFieldFile->set_filename (pp->raw.ff_file);
     } else {
         flatFieldFile_Reset();