avoid 'format not a string literal and no format arguments'

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@57425 15284696-431f-4ddb-bdfa-cd5b030d7da7

ps/ps.map/error.c

@@ -17,7 +17,8 @@ int error(const char *a, const char *b, const char *c)
     if (isatty(0))
 	fprintf(stderr, "%s\n", msg);
     else
-	G_fatal_error(msg);
+	G_fatal_error("%s", msg);
+
     reject();
 
     return 0;