[ScalarizeMaskedMemIntrin] Fix the alignment calculation for the scalar stores of a masked store expansion.

It should be the minimum of the original alignment and the scalar size.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@343284 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed