inetd: constify data

diff --git a/networking/inetd.c b/networking/inetd.c
index 590bf23..751010b 100644
--- a/networking/inetd.c
+++ b/networking/inetd.c
@@ -658,7 +658,7 @@
 	}
 
 	{
-		static int8_t SOCK_xxx[] ALIGN1 = {
+		static const int8_t SOCK_xxx[] ALIGN1 = {
 			-1,
 			SOCK_STREAM, SOCK_DGRAM, SOCK_RDM,
 			SOCK_SEQPACKET, SOCK_RAW