Fix for mysql_set_character_set:
Fix for mysql_set_character_set:

Give a more detailled error information, in case SET NAMES failed.

ottok/mariadb-connector-c,MariaDB/mariadb-connector-c,MariaDB/mariadb-connector-c,MariaDB/mariadb-connector-c,ottok/mariadb-connector-c,ottok/mariadb-connector-c