is behind a transparent wall, but instead give a message about being unable to hear the mermaid.
git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@6215 c06c8d41-db1a-0410-9941-cceddc491573
23S5SPIJC5VOGKB5RQ3VEEXPUERPYT6WIR54FUSCRENQNGDHUF7AC if (player_monster_visible(monster))
int walls = num_feats_between(you.x_pos, you.y_pos,monster->x, monster->y, DNGN_UNSEEN,DNGN_MAXWALL);if (walls > 0){simple_monster_message(monster, " appears to sing, but you ""can't hear her.");break;}else if (player_monster_visible(monster))