Revert changes to src.slottypes

Author: serenity4

src/CthulhuBase.jl

@@ -222,10 +222,10 @@ function lookup_unoptimized(interp::CthulhuInterpreter, ci::CodeInstance)
     (; rt, exct) = unopt
     infos = unopt.stmt_info
     effects = unopt.effects
+    slottypes = src.slottypes
     if isnothing(src.slottypes)
-        src.slottypes = Any[ Any for i = 1:length(src.slotflags) ]
+        slottypes = Any[ Any for i = 1:length(src.slotflags) ]
     end
-    slottypes = src.slottypes
     return LookupResult(src, rt, exct, infos, slottypes, effects, codeinf)
 end