ZF-11462: Trace not always includes class and type in Zend_Wildfire_Plugin_FirePhp
In the Zend_Wildfire_Plugin_FirePhp is an minor issue. If you Zend_Wildfire_Plugin_FirePhp::send() a log event of style 'TRACE', it can happend, due the 'traceOffset' truncating, that the first element of returned trace array has no information about the 'class' and the 'type'.
To fix this, handle $trace['class'] and $trace['type'] as optional information -> e.q. $trace['file']