Bisected to: 159676d89c24d4b61c972da28db73645525cf051

Downstream report: https://bugs.launchpad.net/ubuntu/+source/xfce4-terminal/+bug/1751403

xfce4-terminal 0.8.6-0ubuntu1 amd64

This command no longer behave correctly:
    xfce4-terminal --geometry=80x25-170-40

Expected:
Per X(7), this should create a window whose lower right corner is located
170 pixels left of and 40 pixels up from the bottom right corner of the screen.

What happens:
Entering the example geom spec is incorrectly treated as if it were:
    80x25-0-0