Dereferenced pointer checks in data.c of ECPG

Hi all,

ecpg_get_data@data.c is using to null-pointer checks for pval but it
happens that we have the guarantee that those pointers are never NULL, see
for example this piece of code at the code of ecpg_get_data():
/* pval is a pointer to the value */
if (!pval)
{
/*
* This should never happen because we already checked that
we found
* at least one tuple, but let's play it safe.
*/
ecpg_raise(lineno, ECPG_NOT_FOUND, ECPG_SQLSTATE_NO_DATA,
NULL);
return (false);
}
A patch is attached, and the issue has been spotted by Coverity.
Regards,
--
Michael