Segmentation Fault when opening empty rooms
When opening rooms like this one (a backup file)
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<geometry version="0.8" caption="corner" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="http://xsd.jupedsim.org/jps_geometry.xsd" unit="m">
<rooms>
<room id="0" caption="floor">
<crossings/>
</room>
</rooms>
<transitions/>
<Undefine/>
</geometry>
a SegFault is produced.
We simply should expect these files and don't parse them at all.