plpgsql plugin - stmt_beg/end is not called for top level block of statements

Hi

I am playing with plpgsql profiling and and plpgsql plugin API. I found so
callback stmt_beg and stmt_end was not called for top statement due direct
call exec_stmt_block function.

<-->estate.err_text = NULL;
<-->estate.err_stmt = (PLpgSQL_stmt *) (func->action);
<-->rc = exec_stmt_block(&estate, func->action);
<-->if (rc != PLPGSQL_RC_RETURN)
<-->{
<--><-->estate.err_stmt = NULL;
<--><-->estate.err_text = NULL;

Isn't better to call exec_stmt there? Then plpgsql plugin function will be
called really for every plpgsql statement.

Regards

Pavel