Give old_state a default value so we won't try to restore
an uninitialized value.  In reality the code block that 
initializes it and the code block that restores it will always
match up - but the analyzer doesn't know that and I want to 
quiet it, so...
clang static analyzer fixit.


git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@219869 91177308-0d34-0410-b5e6-96231b3b80d8