Guard against AI_NUMERICSERV not being defined.

Author: sgolemon

ext/sockets/sockets.c

@@ -802,7 +802,9 @@ static PHP_MINIT_FUNCTION(sockets)
 	REGISTER_LONG_CONSTANT("AI_IDN_ALLOW_UNASSIGNED",		AI_IDN_ALLOW_UNASSIGNED, CONST_CS | CONST_PERSISTENT);
 	REGISTER_LONG_CONSTANT("AI_IDN_USE_STD3_ASCII_RULES",	AI_IDN_USE_STD3_ASCII_RULES, CONST_CS | CONST_PERSISTENT);
 #endif
+#ifdef AI_NUMERICSERV
 	REGISTER_LONG_CONSTANT("AI_NUMERICSERV",	AI_NUMERICSERV,		CONST_CS | CONST_PERSISTENT);
+#endif
 
 	php_socket_sendrecvmsg_init(INIT_FUNC_ARGS_PASSTHRU);