Pdok 18835/vervanging trex v2 exit without geoms

[DvBree]

Description

Fix: there was undesireable behaviour when a geometry disappears after snapping (e.g., because it degenerates to points and lines). In this PR we replicate the behaviour from the current master version of texel in the vervanging-trex feature branch.

Example; if g is such a geometry, then the current feature branch behaviour (incorrect) is roughly to set newGeometries[zoomLevel] = nil. The fixed behaviour is to leave newGeometries[zoomLevel] to be unset.

Aside from undesirable behaviour, this did cause the program to crash when using BBox for tile detection, since it would try to encode a nil geometry. This is a side effect of the fact that BBox does not discount degenerate parts of the polygon. Whether this is desirable is another issue.

Type of change

• Bugfix

Checklist:

• I've double-checked the code in this PR myself
• I've left the code better than before (boy scout rule)
• The code is readable, comments are added that explain hard or non-obvious parts.
• I've expanded/improved the (unit) tests, when applicable
• I've run (unit) tests that prove my solution works
• There's no sensitive information like credentials in my PR