Fix the regression introduced in
dfb41fdd.

In the restructure of mysql_rm_table_no_locks the early condition
of !frm_error that enabled non_tmp_table_deleted, and hence the
query cache invalidation, was removed.

The query_cache_invalidate1(thd, dbnorm) called after
mysql_rm_table_no_locks depends on the query cache removal
(for unexamined reasons).

Under DROP DATABASE, in mysql_rm_table_no_locks, dont_log_query
is true preventing the late setting of non_tmp_table_deleted
(which retained one of its purposes as a replication deletion
of temporary tables, but not query cache invalidation).

The non_temp_tables_count however can still be used to invalidate
the query cache.