Added the equivalent of gdb's "unwind-on-signal" to the expression command, and a parameter to control it in ClangUserExpression, and on down to ClangFunction.  

git-svn-id: https://llvm.org/svn/llvm-project/llvdb/trunk@118290 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/source/Commands/CommandObjectExpression.h b/source/Commands/CommandObjectExpression.h
index a154549..9cbdf34 100644
--- a/source/Commands/CommandObjectExpression.h
+++ b/source/Commands/CommandObjectExpression.h
@@ -51,6 +51,7 @@
         lldb::Format    format;
         bool        debug;
         bool        print_object;
+        bool        unwind_on_error;
         bool        show_types;
         bool        show_summary;
     };