Fix not incrementing lump handle reference count on LumpOpen.
Fixes a crash in some mods using the API, upon game exit. And also fixes multiple LumpOpens to the same file.
All legacy (hg-git based) Projects have been automatically migrated to native with the upgrade of 2025-01-23
Fixes a crash in some mods using the API, upon game exit. And also fixes multiple LumpOpens to the same file.