macro to define core RPC version for avoiding future mistake

src/rpc/core_rpc_server_commands_defs.h

@@ -50,7 +50,8 @@ namespace cryptonote
 // Don't go over 32767 for any of these
 #define CORE_RPC_VERSION_MAJOR 1
 #define CORE_RPC_VERSION_MINOR 5
-#define CORE_RPC_VERSION (((CORE_RPC_VERSION_MAJOR)<<16)|(CORE_RPC_VERSION_MINOR))
+#define MAKE_CORE_RPC_VERSION(major,minor) (((major)<<16)|(minor))
+#define CORE_RPC_VERSION MAKE_CORE_RPC_VERSION(CORE_RPC_VERSION_MAJOR, CORE_RPC_VERSION_MINOR)
 
   struct COMMAND_RPC_GET_HEIGHT
   {