Fix minor speech mechanics in houses

[andreyboytsov]

Adding on behalf of Templayer:

There is something really annoying in this game engine, generally speaking, which is that, sometimes (or always?), even without selecting the portrait of a NPC in a house to chat with, certain of his/her chat options are actualised as if you have already talked to them, by just entering and leaving the building, and entering again. This happens very clearly with the Daggerwound Island Town Hall NPCs. It is a bit more subtle, but I think also happens with every single Teacher greeting speeches in the houses of Jadame. This is vanilla stuff of course; dumb 'AI'.

For more details see: https://gitlab.com/templayer/mmmerge/-/issues/383