This is already checked in `->createWebpVariant()`, but with the `->update()`
added in the previous commit this saves some work.
$userProfiles = new UserProfileList();
$userProfiles->getConditionBuilder()->add("user_table.userID IN (?)", [$userIDs]);
$userProfiles->getConditionBuilder()->add("user_table.coverPhotoHash IS NOT NULL");
+ $userProfiles->getConditionBuilder()->add("user_table.coverPhotoHasWebP = ?", [0]);
$userProfiles->readObjects();
foreach ($userProfiles as $userProfile) {
$editor = new UserEditor($userProfile->getDecoratedObject());