Fix typo in "socketcall".

Pointed out by jjelen at redhat.com.
diff --git a/sandbox-seccomp-filter.c b/sandbox-seccomp-filter.c
index 200932a..ca75cc7 100644
--- a/sandbox-seccomp-filter.c
+++ b/sandbox-seccomp-filter.c
@@ -225,7 +225,7 @@
 #endif
 #ifdef __NR_socketcall
 	SC_ALLOW_ARG(__NR_socketcall, 0, SYS_SHUTDOWN),
-	SC_DENY(__NR_ssocketcall, EACCES),
+	SC_DENY(__NR_socketcall, EACCES),
 #endif
 #if defined(__NR_ioctl) && defined(__s390__)
 	/* Allow ioctls for ICA crypto card on s390 */