Fix GH-11629: bug77020.phpt tries to send mail

Closes GH-11636.

Author: nielsdos

ext/imap/tests/bug77020.phpt

@@ -2,8 +2,13 @@
 Bug #77020 (null pointer dereference in imap_mail)
 --EXTENSIONS--
 imap
+--INI--
+sendmail_path="echo >/dev/null"
 --FILE--
 <?php
+// For Windows, set it to a string of length HOST_NAME_LEN (256) so the mail is not actually sent
+ini_set("SMTP", str_repeat("A", 256));
+
 @imap_mail('1', 1, NULL);
 echo 'done'
 ?>