Fix an assertion when skipping stack values in DWARF2 mode.
The fix consists of resetting LocationKind when addMachineRegExpression fails.

rdar://problem/31803010

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@301351 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed