all: fix ISO C compliance

In ISO C, at least one argument should be specified for
the "..." argument of a function-like macro.

Signed-off-by: Cheng Qiao <admin@cismon.net>
Acked-by: Tom Hromatka <tom.hromatka@oracle.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>

include/seccomp.h.in

@@ -248,7 +248,7 @@ struct scmp_arg_cmp {
 #define SCMP_SYS(x)		(__SNR_##x)
 
 /* Helpers for the argument comparison macros, DO NOT USE directly */
-#define _SCMP_VA_NUM_ARGS(...)	_SCMP_VA_NUM_ARGS_IMPL(__VA_ARGS__,2,1)
+#define _SCMP_VA_NUM_ARGS(...)	_SCMP_VA_NUM_ARGS_IMPL(__VA_ARGS__,2,1,0)
 #define _SCMP_VA_NUM_ARGS_IMPL(_1,_2,N,...)	N
 #define _SCMP_MACRO_DISPATCHER(func, ...) \
 	_SCMP_MACRO_DISPATCHER_IMPL1(func, _SCMP_VA_NUM_ARGS(__VA_ARGS__))