BUG in /mod/resource/mod_form.php - require fails in loop

Moodle 1.9.9 (Build: 20100609)
Developing an import script, which imports courses into Moodle from a database of a custom software.
I import and create courses, then doing the following for each course:

• adding forum module,
• adding chat module,
• adding resource (file subtype, used for creating http link) module,
• setting a description to section 0 of each course

Creating of courses are done in a loop, and everything works fine, if just one loop is done.
When doing multiple loops, the execution stopped when /moodle/mod/resource/mod_form.php was executed 2nd time, only one full loop was executed, 2nd loop was stopped.

I tracked down the bug and found, that execution stops at /moodle/mod/resource/mod_form.php line 25
when "resource.class.php" is required.

After changing required to required_once , the loops did not stop at mod_form.php line 25, and all loops was executed, successfully.

BUGFIX in
/moodle/mod/resource/mod_form.php
line 25
require($CFG->dirroot.'/mod/resource/type/'.$type.'/resource.class.php');
change to
require_once($CFG->dirroot.'/mod/resource/type/'.$type.'/resource.class.php');

Please include this BUGFIX into

• Moodle v1.9.13
  and
• Moodle 2.0.4

Thanks in advance.