Handle deleted objects in signal callback (fixes #168).
Handle deleted objects in signal callback (fixes #168).

EuroPython/djep,EuroPython/djep,zerok/pyconde-website-mirror,pysv/djep,zerok/pyconde-website-mirror,pysv/djep,zerok/pyconde-website-mirror,EuroPython/djep,pysv/djep,EuroPython/djep,pysv/djep,pysv/djep