Sean Harvey aeeb7bbc7b BUGFIX Check for form object before calling observe() on the element. The CheckBoxRange constructor allows for a null form, so a check for a form object is essential.
git-svn-id: svn://svn.silverstripe.com/silverstripe/open/modules/cms/branches/2.3@70046 467b73ca-7a2a-4603-9d3b-597d59a354a9
2011-02-02 17:47:53 +13:00
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