a8m.where when collection is undefined

[rodolfojnn]

When collection is undefined on where filter, we got:

"TypeError: Cannot read property 'filter' of undefined"

A simple check solve the problem.

if(!collection)) { return false; }

[a8m]

LGTM.
We should add isUndefined(collection) test on line 15.
feel free to PR. thx

[Muximize]

+1, but this needs to be implemented for all collection filters. I'm using Restangular promises in my $scope, whose collections are undefined before they get resolved. This gives me this error with isEmpty:
TypeError: Cannot read property 'length' of undefined

[HugCoder]

So, nothing actually happened on this? I'm also getting the error:
Error: collection is undefined
@http://cdnjs.cloudflare.com/ajax/libs/angular-filter/0.5.8/angular-filter.js:1278:7
...
Can't the isUndefined(collection) check just be added by the owner (@a8m) to make the implementation consistent? We need a pull request update on #88 for this?