utils: Fix string format message

Fix the format string to match the size_t type, this fixes a build
problem on 64 bit platforms.

Fixes: 4d0c703e750c ("firewall3: Fix some format string problems")
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

1 files changed, 1 insertions, 1 deletions

diff --git a/utils.c b/utils.c
index 5aa7d55..d9b1f7d 100644
--- a/utils.c
+++ b/utils.c
@@ -145,7 +145,7 @@ fw3_alloc(size_t size)
 	mem = calloc(1, size);
 
 	if (!mem)
-		error("Out of memory while allocating %d bytes", size);
+		error("Out of memory while allocating %zd bytes", size);
 
 	return mem;
 }