0 is a valid LSDA encoding and can be seen in statically linked
programs. Initialize lsdaEncoding to DW_EH_PE_omit and check for that
value to decide whether a value should be decoded.


git-svn-id: https://llvm.org/svn/llvm-project/libcxxabi/trunk@203626 91177308-0d34-0410-b5e6-96231b3b80d8