updated for version 7.3.1257

Problem:    With GNU gettext() ":lang de_DE.utf8" does not always result in
            German messages.
Solution:   Clear the $LANGUAGE environment variable.

src/version.c

@@ -728,6 +728,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1257,
 /**/
     1256,
 /**/