Initialize m_allow_cxx, m_allow_objc.  These ivars in the base class are not  initialized in the ctor and they're only initialized to 'true' in ClangUserExpression.cpp when specific languages are detected so we can use uninitialized values.  This bug has been present since the ivars were added in r144042. <rdar://problem/31105864> 
Initialize m_allow_cxx, m_allow_objc.  These ivars in the base class are not 
initialized in the ctor and they're only initialized to 'true' in ClangUserExpression.cpp
when specific languages are detected so we can use uninitialized values.  This
bug has been present since the ivars were added in r144042.
<rdar://problem/31105864> 


git-svn-id: 4c4cc70b1ef44ba2b7963015e681894188cea27e@298333 91177308-0d34-0410-b5e6-96231b3b80d8

apple/swift-lldb,llvm-mirror/lldb,llvm-mirror/lldb,llvm-mirror/lldb,apple/swift-lldb,llvm-mirror/lldb,apple/swift-lldb,apple/swift-lldb,apple/swift-lldb,llvm-mirror/lldb,apple/swift-lldb