Fixed gcc warning, removed unused variable 'flag'

git-svn-id: https://svn.code.sf.net/p/rathena/svn/trunk@15766 54d463be-8e91-2dee-dedb-b68131a5f0ec

src/map/party.c

@@ -334,7 +334,7 @@ int party_recv_info(struct party* sp, int char_id)
 int party_invite(struct map_session_data *sd,struct map_session_data *tsd)
 {
 	struct party_data *p;
-	int i,flag=0;
+	int i;
 	
 	nullpo_ret(sd);