[doc] Fix doxygen comments for members

src/rpc/client.cpp

@@ -18,8 +18,8 @@ using namespace std;
 class CRPCConvertParam
 {
 public:
-    std::string methodName;            //! method whose params want conversion
-    int paramIdx;                      //! 0-based idx of param to convert
+    std::string methodName; //!< method whose params want conversion
+    int paramIdx;           //!< 0-based idx of param to convert
 };
 
 static const CRPCConvertParam vRPCConvertParams[] =