After upgrading to Leap 42.2, xfce4-terminal becomes a zombie immediately after
launched.

Reproducibility:
Always

Hot to reproduce:
1. Launch xfce4-terminal
2. Run 'ps aux | grep Z' in that terminal.

Result:
You will see that the very xfce4-terminal you are using is a zombie. 'kill' or
'kill -9' don't work, so we use pstree to find the zombie's parent. It's
another xfce4-terminal instance which responds to signals fine.

Expected result:
xfce4-terminal should not be a zombie. Not sure if there should be two
instances of it.

Affected packages
xfce4-terminal-0.6.3-4.16.x86_64