Fix: message numbers listed with 'H' reading msgs command

Broken in commit 082a9fce 3 years ago, the 'H' (highest ranked) message listing was showing the rank of the message (e.g. 1-20) instead of the message number itself.

src/sbbs3/readmsgs.cpp

@@ -968,7 +968,7 @@ int sbbs_t::scanposts(uint subnum, long mode, const char *find)
 				}
 				memcpy(ranked, post, sizeof(post_t)*smb.msgs);
 				qsort(ranked, smb.msgs, sizeof(post_t), rank_post);
-				listmsgs(subnum, 0, ranked, 0, 20);
+				listmsgs(subnum, 0, ranked, 0, 20, /* reading: */false);
 				free(ranked);
 				break;
 			}