failure to collect mysql stats with innodb disabled

[nambrosch]

when disabling the innodb engine (mysql 5.1 in this instance) at least three metrics stop functioning. let me know if you need to know which metrics. here is the error from collector.log:

2013-07-04 15:38:14,854 | ERROR | dd.collector | checks.mysql(__init__.py:454) | Check 'mysql' instance #0 failed Traceback (most recent call last): File "/usr/share/datadog/agent/checks/__init__.py", line 445, in run self.check(instance) File "/usr/share/datadog/agent/checks.d/mysql.py", line 58, in check self._collect_metrics(greater_502, db, tags, options) File "/usr/share/datadog/agent/checks.d/mysql.py", line 267, in _collect_metrics innodb_buffer_pool_pages_total = innodb_buffer_pool_pages_total * page_size; TypeError: unsupported operand type(s) for *: 'NoneType' and 'NoneType'