Stop using EXIT_{SUCCESS,FAILURE}

mv.c

@@ -34,7 +34,7 @@ main(int argc, char *argv[])
 		eprintf("%s: not a directory\n", argv[argc-1]);
 	enmasse(argc, &argv[0], mv);
 
-	return EXIT_SUCCESS;
+	return 0;
 }
 
 static int