woothemes/woocommerce — comment on commit 3cb8f314c3d5bb2f1572b8279b2272a1edf3fd2e
File: classes/class-wc-query.php line 38
By GeertDD:

Okay, if `$_attributes_array` evaluates to `FALSE` the whole `if` block's result changes. The `$_attributes_array` seems superflouous nevertheless. I suggest to revert this line.