Install schema creates index instead of unique constraint.

In the install schema, you create an index where I believe you want a unique constraint over the first three fields.

Index: shindig_integrator.install
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RCS file: /cvs/drupal-contrib/contributions/modules/ShindigIntegrator/shindig_integrator/shindig_integrator.install,v
retrieving revision 1.2.2.2
diff -r1.2.2.2 shindig_integrator.install
228c228
<     'indexes' => array(
---
>     'unique keys' => array(