Fix CommandObjectMultiword to initialize all members, and beef up corresponding test case.

llvm-svn: 175798
diff --git a/lldb/source/Commands/CommandObjectMultiword.cpp b/lldb/source/Commands/CommandObjectMultiword.cpp
index aa3a8eb..c87a9d7 100644
--- a/lldb/source/Commands/CommandObjectMultiword.cpp
+++ b/lldb/source/Commands/CommandObjectMultiword.cpp
@@ -34,7 +34,8 @@
     const char *syntax,
     uint32_t flags
 ) :
-    CommandObject (interpreter, name, help, syntax, flags)
+    CommandObject (interpreter, name, help, syntax, flags),
+    m_can_be_removed(false)
 {
 }