[cpp] Remove internal debug output

gencpp.ml

@@ -197,7 +197,7 @@ let new_context common_ctx writer debug file_info =
 	ctx_common = common_ctx;
 	ctx_writer = writer;
 	ctx_output = (writer#write);
-	ctx_dbgout = if debug>0 then (writer#write) else (fun _ -> ());
+	ctx_dbgout = if debug>1 then (writer#write) else (fun _ -> ());
 	ctx_calling = false;
 	ctx_assigning = false;
 	ctx_debug_level = debug;