merge two onInterest callback into one

Change-Id: I82e8150239d795cb465ea2526624300590e4434c
diff --git a/src/client-module.hpp b/src/client-module.hpp
index f90cff3..394c584 100644
--- a/src/client-module.hpp
+++ b/src/client-module.hpp
@@ -103,7 +103,7 @@
   onRevokeResponse(const Data& reply);
 
   std::list<std::string>
-  onRequestInitResponse(const Data& reply, int requestType);
+  onRequestInitResponse(const Data& reply, RequestType requestType);
 
   shared_ptr<Interest>
   generateChallengeInterest(const Block& paramTLV);