[esan] Fix isShadowMem endpoint bug
[esan] Fix isShadowMem endpoint bug

Fixes a bug in checking the endpoint of a shadow region and removes an
invalid check (both introduced in http://reviews.llvm.org/rL269198).

git-svn-id: c199f293c43da69278bea8e88f92242bf3aa95f7@269834 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/compiler-rt,llvm-mirror/compiler-rt,llvm-mirror/compiler-rt,llvm-mirror/compiler-rt,llvm-mirror/compiler-rt