Fixed some SWIG interoperability issues

git-svn-id: https://llvm.org/svn/llvm-project/llvdb/trunk@138154 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/source/API/SBCommandInterpreter.cpp b/source/API/SBCommandInterpreter.cpp
index b56ccb4..5b3371b 100644
--- a/source/API/SBCommandInterpreter.cpp
+++ b/source/API/SBCommandInterpreter.cpp
@@ -344,7 +344,7 @@
     lldb::DebuggerSP& debugger,
     const char* args,
     std::string& err_msg,
-    void* cmd_retobj
+    lldb_private::CommandReturnObject& cmd_retobj
 );