logilab-astng #124337 crash on a simple gtk pb [validation pending]

see https://bugs.launchpad.net/ubuntu/+source/pylint/+bug/1157395/

reproduced using

pylint 0.27.0,
astng 0.24.2, common 0.59.0
Python 2.7.3 (default, Aug  1 2012, 05:14:39)
prioritynormal
typebug
done in0.24.3
load0.200
load left0.000
closed by#d4cf183a28fa don't call const_factory for builtin types subclasses, this will trigger error later. Closes #124337
patchdon't call const_factory for builtin types subclasses, this will trigger error later. Closes #124337 [applied]don't call const_factory for builtin types subclasses, this will trigger error later. Closes #124337 [applied]