[Ohrrpgce] SVN: teeemcee/11792 Fix wrong slice type error every time you try to add an enemy!

[subversion at HamsterRepublic.com]

teeemcee
2020-04-30 20:40:25 -0700 (Thu, 30 Apr 2020)
184
Fix wrong slice type error every time you try to add an enemy!

Last minute bugfinding by Idontknow!
This bug was caused by the last-minute addition of enemy preview backdrops.
Whoops.
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U   wip/enemyedit.bas
U   wip/sliceedit.bas
U   wip/slices.bas
U   wip/slices.bi