- fixed gcc warning

cfg.lex

@@ -181,7 +181,8 @@ PLUS	"+"
 MINUS	"-"
 
 /* Attribute specification */
-ATTR_MARK   "$"|"%"|"@"
+ATTR_MARK   "$"|"%"
+FUNC_MARK   "@"
 ATTR_FROM   "from"|"f"
 ATTR_TO     "to"|"t"
 ATTR_USER   "user"|"u"
@@ -494,6 +495,7 @@ EAT_ABLE	[\ \t\b\r]
                            BEGIN(INITIAL);
 			   return ID; 
                         }
+<INITIAL>{FUNC_MARK}    { count(); return FUNC_MARK; }
 
 <INITIAL>{IPV6ADDR}		{ count(); yylval.strval=yytext; return IPV6ADDR; }
 <INITIAL>{DECNUMBER}		{ count(); yylval.intval=atoi(yytext);return NUMBER; }

cfg.y

@@ -264,6 +264,7 @@ static struct socket_id* mk_listen_id(char*, int, int);
 %token TOS
 
 %token ATTR_MARK
+%token FUNC_MARK
 %token ATTR_FROM
 %token ATTR_TO
 %token ATTR_USER
@@ -1192,6 +1193,9 @@ attr_id : ATTR_MARK ID { s_attr = (struct avp_spec*)pkg_malloc(sizeof(struct avp
                                             }
 ;
 
+func_id : FUNC_MARK ID
+       
+
 assign_op : ADDEQ { $$ = ADD_T; }
           | EQUAL { $$ = ASSIGN_T; }
 ;