BitBltPlugin as per VMMaker.oscog-eem.2285 BitBltSimulation>>copyLoop: Fix type inference of variable unskew in BitBlt >> copyLoop Strength reduce the loop split for combinationRule = 3 so that less tests are done in the inner loop and so trhat when combinstionRule = 3 mergeFn is never used.  Use an explicit type declaration for unskew instead of trickier relying on type inference
BitBltPlugin as per VMMaker.oscog-eem.2285
BitBltSimulation>>copyLoop:
Fix type inference of variable unskew in BitBlt >> copyLoop
Strength reduce the loop split for combinationRule = 3 so that less tests are
done in the inner loop and so trhat when combinstionRule = 3 mergeFn is never
used.  Use an explicit type declaration for unskew instead of trickier relying
on type inference

timfel/squeakvm,timfel/squeakvm,timfel/squeakvm,timfel/squeakvm,timfel/squeakvm,OpenSmalltalk/vm,OpenSmalltalk/vm,OpenSmalltalk/vm,OpenSmalltalk/vm,OpenSmalltalk/vm,timfel/squeakvm,timfel/squeakvm,OpenSmalltalk/vm,OpenSmalltalk/vm,OpenSmalltalk/vm,timfel/squeakvm