Callgrind: fix BB discarding

When the info struct for a BB is created, we use the first guest
instruction address as key to insert the info into a hash table.
We should do the same when discarding.

This actually is not a real problem, as Callgrind obviously
is used very rarely with redirections. But we should be consistent
with cachegrind.

git-svn-id: svn:// a5019735-40e9-0310-863c-91ae7b9d1cf9
1 file changed