Calloc() memory corruption

In the file iidbicurs.c, the line:2026~2027
2026          pstmt->descriptor[i]->columnName = calloc(1,cbColName + 1);
2027          strcpy(pstmt->descriptor[i]->columnName, (char *)colName);
if calloc allocate memory failed, it will return NULL, but next the NULL will be used to point colName.
it will happen the memory corruption.
