fix #285 - feeling cockatrice corpse while blind (trunk only)

fix #285 - feeling cockatrice corpse while blind (trunk only)

     From a bug report:  moving while blind
and gloveless onto spot containing a cockatrice corpse is fatal if there
are fewer than 5 items there, but harmless when you get the "there are
several/many objects here" result for 5 or more.  I thought that this was
something which had already been changed, but it wasn't.  Run a touch
check on the whole pile of objects even when no object-by-object feedback
is being given.

     Trunk only because it's using the trunk version of corpse_xname().