Fix Headless --import --quit crashes editor

[TCROC]

Fixes this issue here:

#98062

addon_name_to_plugin.clear(); should be called due to the fact each plugin in addon_name_to_plugin was just deleted in the preceding for loop. Future attempts to access the items in addon_name_to_plugin after memdelete was called result in crashes.

• Bugsquad edit, fixes: Headless --import --quit crashes editor #98062

[clayjohn]

makes sense to me. Would be good to have @bruvzg's approval too before merging

[jamie-pate]

I can confirm that this patch fixes the crash.

[bruvzg]

If Main::iteration() has deleted all the plugns then it seems like import tasks relying on those plugins will either

It is deleting plugins only when exiting, and Main::iteration have a check to wait for running importers and unset exit flag, this should not be possible.

[Repiteo]

Thanks!