Noticed while considering the pull request about loosening
restrictions on trap creation at furniture locations. If you wish
for a terrain feature while on a fountain or sink, the counters
used to control whether sounds for those should be given will be
off by one.
It was incrementing the appropriate counter if you wished for a
fountain or sink, but it shouldn't do that if recreating the same
feature (perhaps to reset a magic fountain or looted sink) and it
needed to decrement when replacing either of those with some other
feature. After the count became wrong, if all fountains or sinks
on the level were destroyed, those splashing, gurgling, &c sounds
would continue to be generated periodically.
0ca2af4d8b