[Ohrrpgce] SVN: teeemcee/11252 Fix another error: "failed to load palette" when picking new palette in

[subversion at HamsterRepublic.com]

teeemcee
2019-08-16 03:22:17 -0700 (Fri, 16 Aug 2019)
237
Fix another error: "failed to load palette" when picking new palette in sprite editor

Could happen four different ways!
Of course this message could also be produced by an invalid palette number
somewhere, I didn't silence those errors.
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U   wip/allmodex.bas
U   wip/allmodex.bi
U   wip/customsubs.rbas
U   wip/drawing.bas