fixed: write_image_file failed with --export with relative path, because the...

fixed: write_image_file failed with --export with relative path, because the is-relative-to-target-dir check was wrong

src/script/functions/export.cpp

@@ -44,7 +44,6 @@ String get_export_full_path(String& rel_name) {
 	if (!ei.allow_writes_outside) {
 		// check if path is okay
 		wxFileName fn2(_("x"));
-		fn2.SetPath(ei.directory_absolute);
 		fn2.Normalize(wxPATH_NORM_ALL, ei.directory_absolute);
 		String p1 = fn.GetFullPath();
 		String p2 = fn2.GetFullPath();
@@ -53,7 +52,7 @@ String get_export_full_path(String& rel_name) {
 			throw ScriptError(_("Not a relative filename: ") + rel_name);
 		}
 	}
-	rel_name = fn.GetFullName();
+	rel_name = fn.GetFullName(); // TODO: does this work correctly with subdirectories in target dir?
 	return fn.GetFullPath();
 }