zikula/core — pull request #1740 by lmm-git (2014-06-09 20:22:44+00:00)
Title: [Form] allow template to set the onsubmit tag - check correction

| Q | A
| ------------- | ---
| Bug fix? | yes
| New feature? | no
| BC breaks? | no
| Deprecations? | no
| Tests pass? | yes
| Fixed tickets | -
| Refs tickets | #1739
| License | MIT
| Doc PR | -

Replaced !is_null with isset to prevent php errors