Maintain 16-byte stack alignment in win32 SSE2 regime on Alien callbacks.
Maintain 16-byte stack alignment in win32 SSE2 regime on Alien callbacks.


git-svn-id: http://squeakvm.org/svn/squeak/trunk@2454 fa1542d4-bde8-0310-ad64-8ed1123d492a

Former-commit-id: aa87048b72fb3cb50a1f0477ee9686cfbf3ee22e
bencoman/pharo-vm,OpenSmalltalk/vm,peteruhnak/pharo-vm,bencoman/pharo-vm,peteruhnak/pharo-vm,bencoman/pharo-vm,peteruhnak/pharo-vm,OpenSmalltalk/vm,OpenSmalltalk/vm,OpenSmalltalk/vm,bencoman/pharo-vm,peteruhnak/pharo-vm,timfel/squeakvm,OpenSmalltalk/vm,bencoman/pharo-vm,OpenSmalltalk/vm,timfel/squeakvm,timfel/squeakvm,bencoman/pharo-vm,timfel/squeakvm,peteruhnak/pharo-vm,timfel/squeakvm,OpenSmalltalk/vm,bencoman/pharo-vm,peteruhnak/pharo-vm,bencoman/pharo-vm,timfel/squeakvm,peteruhnak/pharo-vm,timfel/squeakvm,timfel/squeakvm,peteruhnak/pharo-vm,bencoman/pharo-vm,OpenSmalltalk/vm