Initialize FunctionCaller::m_struct_valid

[tromey]

Summary

Nothing ever initializes FunctionCaller::m_struct_valid,
so initialize it to false in the constructor.

[clayborg]

We need a clang warning that tells us when POD types are not initialized! I am sure we have other similar issues...

[tromey]

I don't have write access so someone will have to land this for me. Thanks.

source/Expression/FunctionCaller.cpp

FunctionCaller::FunctionCaller(ExecutionContextScope &exe_scope,
                                const ValueList &arg_value_list,
                                const char *name)
     : Expression(exe_scope), m_execution_unit_sp(), m_parser(),
       m_jit_module_wp(), m_name(name ? name : "<unknown>"),
       m_function_ptr(NULL), m_function_addr(functionAddress),
       m_function_return_type(return_type),
       m_wrapper_function_name("__lldb_caller_function"),
       m_wrapper_struct_name("__lldb_caller_struct"), m_wrapper_args_addrs(),
-      m_arg_values(arg_value_list), m_compiled(false), m_JITted(false) {
+      m_struct_valid(false), m_arg_values(arg_value_list), m_compiled(false),
+      m_JITted(false) {
   m_jit_process_wp = lldb::ProcessWP(exe_scope.CalculateProcess());
   // Can't make a FunctionCaller without a process.
   assert(m_jit_process_wp.lock());
 }
 
 //----------------------------------------------------------------------
 // Destructor
 //----------------------------------------------------------------------