Zabbix

A.F....... [ZBX-8979] fixed undefined indexes in the profiler on early version of PHP 5.3

Before the fix:
- Due to a bug in earlier versions of PHP 5.3, debug_backtrace() did not return the file name and line number for calls to magic methods and anonymous functions, which caused and undefined index error.

After the fix:
- Such results are properly handled to avoid the error.