Suppress PHP warning during unlink in adodb_write_file()
Suppress PHP warning during unlink in adodb_write_file()

Fixes #46

ipso/ADOdb,pyscht/ADOdb,andrewnicols/ADOdb,ipso/ADOdb,andrewnicols/ADOdb,paulproteus/ADOdb,pyscht/ADOdb,paulproteus/ADOdb