Bug - loading output files from gui

[JanMerlinV]

Running ipet-gui, loading readers-example.xml and evaluation.xml and subsequently selecting

Experiment -> Load Output Files -> check.mipdev-complete.scip-4.0.0.2.linux.x86_64.gnu.opt.spx2.none.M610.default.out

leads to:

Traceback (most recent call last):
File "/nfs/OPTI/bzfviern/workspace/ipet/venv/lib/python3.5/site-packages/ipet-0.0.9-py3.5.egg/ipetgui/IPETParserWindow.py", line 120, in updateView
if idx > linesend:
TypeError: unorderable types: int() > NoneType()

@GregorCH
@fschloesser