#dip fix (trunk only)

#dip fix (trunk only)

     A post-3.4.3 dipping change (to make the dipping prompt mention
the item that you've chosen to dip) formats a phrase for its eventual
getobj() call in advance, but then was modifying it inappropriately if
you were on a fountain or pool location.  If you declined to dip into
the fountain or pool, the prompt for carried potion to dip into was
garbled:   "What do you want to Dip <the object> into the fountain??".
instead of "What do you want to dip <the object> into?".  Fix to use
a separate buffer in the case of a fountain or pool prompt so that the
"dip <the object> into" phrase will be intact when calling getobj().