fstrim: Indicate failure on error

+14b

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

util-linux/fstrim.c

@@ -103,6 +103,7 @@ int fstrim_main(int argc UNUSED_PARAM, char **argv)
 
 		if (opts & OPT_v)
 			printf("%s: %llu bytes were trimmed\n", bd, range.len);
+		return EXIT_SUCCESS;
 	}
-	return EXIT_SUCCESS;
+	return EXIT_FAILURE;
 }