[APIS-943] SQLColumnsW/SQLForeignKeysW does not work properly

[kisoo-han]

http://jira.cubrid.org/browse/APIS-943

Purpose

• To fix bug, SQLColumnsW, SQLForeignKeysW

Implementation
ASIS

retcode = SQLColumns (hstmt, NULL, 0, NULL, 0, "code", 4, "", 0);
..
retcode = SQLForeignKeysW (hstmt, NULL, 0, NULL, 0, L"olympic", SQL_NTS, NULL, 0, NULL, 0, "", 0);

TOBE

retcode = SQLColumns (hstmt, NULL, 0, NULL, 0, "code", 4, NULL, 0);
...
retcode = SQLForeignKeysW (hstmt, NULL, 0, NULL, 0, L"olympic", SQL_NTS, NULL, 0, NULL, 0, NULL, 0);

Remarks