Fix Apache log level name. Not APLOG_ERROR but APLOG_ERR.
Fix Apache log level name. Not APLOG_ERROR but APLOG_ERR.

Reported by onokonem.

BUG= http://code.google.com/p/pywebsocket/issues/detail?id=120
Review URL: http://codereview.appspot.com/5373091
GoogleChromeLabs/pywebsocket3,google/pywebsocket,googlearchive/pywebsocket,GoogleChromeLabs/pywebsocket3,googlearchive/pywebsocket,googlearchive/pywebsocket,google/pywebsocket,GoogleChromeLabs/pywebsocket3,google/pywebsocket