[NETFILTER]: nf_log: add netfilter gcc printf format checking

Signed-off-by: Helge Deller <[e-mail]>
Signed-off-by: Patrick McHardy <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

include/net/netfilter/nf_log.h

···
 		   const struct net_device *in,
 		   const struct net_device *out,
 		   const struct nf_loginfo *li,
-		   const char *fmt, ...);
+		   const char *fmt, ...) __attribute__ ((format(printf,7,8)));
 
 #endif /* _NF_LOG_H */