Compare page header sometimes shows when it should be hidden, such as when comparing two tests with different IDs that are not experiments.

[scottjehl]

The regression seemed to come from this unrelated commit. Maybe we can make the if condition contingent on $tests being undefined?

5926f1d

[scottjehl]

Tim this seems to do the trick but I'm not familiar enough with the original commit's goals.

if (isset($test['test']['completeTime']) || (!isset($tests) && file_exists("$testPath/test.complete") ) ) {