Ignore "call_user_func" from debug backtrace
Ignore "call_user_func" from debug backtrace

Helps make this compliant where there is no class defined
dangnguyen27/monolog,pomaxa/monolog,aeryaguzov/monolog,brendo/monolog,Seldaek/monolog,chinaweilu/monolog,lyrixx/monolog,thiagotalma/monolog,JCook21/monolog,bd808/monolog,printerpam/monolog,cherrytech/monolog,tavrij/test,Sgoettschkes/monolog,webwlsong/monolog,rap2hpoutre/monolog,prgTW/monolog,dailymotion/monolog,localheinz/monolog,dracony/monolog,gencer/monolog,mbrevda/monolog,deguif/monolog,netgusto/monolog