'simple' error message functions by Loic Grenie <loic.grenie@gmail.com>.
263 bytes saved.

diff --git a/e2fsprogs/fsck.c b/e2fsprogs/fsck.c
index 3717781..110b3d2 100644
--- a/e2fsprogs/fsck.c
+++ b/e2fsprogs/fsck.c
@@ -659,7 +659,7 @@
 	if (!noexecute) {
 		pid = spawn(argv);
 		if (pid < 0)
-			bb_perror_msg("%s", argv[0]);
+			bb_simple_perror_msg(argv[0]);
 	}
 
 	for (i = num_args+1; i < argc; i++)