Adjusted an inter packet to respect NAME_LENGTH

Follow up to b8d4761

src/map/intif.c

@@ -543,9 +543,9 @@ int intif_create_party(struct party_member *member,char *name,int item,int item2
 		return 0;
 	nullpo_ret(member);
 
-	WFIFOHEAD(inter_fd, 30+sizeof(struct party_member));
+	WFIFOHEAD(inter_fd, 6+NAME_LENGTH+sizeof(struct party_member));
 	WFIFOW(inter_fd,0) = 0x3020;
-	WFIFOW(inter_fd,2) = 30+sizeof(struct party_member);
+	WFIFOW(inter_fd,2) = 6+NAME_LENGTH+sizeof(struct party_member);
 	memcpy(WFIFOP(inter_fd,4),name, NAME_LENGTH);
 	WFIFOB(inter_fd,28)= item;
 	WFIFOB(inter_fd,29)= item2;