Fix bug #12852 : do not increment the open handle count to a table if the table does not have an .ibd file and InnoDB decides to return an error from the ::open() function; then the table can be dropped even if the user has tried to open it


sql/ha_innodb.cc:
  Fix bug #12852 : do not increment the open handle count to a table if the table does not have an .ibd file and InnoDB decides to return an error from the ::open() function; then the table can be dropped even if the user has tried to open it