fix typo

app/workers/score_calculator_worker.rb

@@ -19,10 +19,10 @@ class ScoreCalculatorWorker
     score = 0
 
     # 250 points if it has thumbnail
-    score += weights[:thumbnail] unless object.thumbnail.empty?
+    score += weights[:thumbnail] unless object.thumbnail.blank?
 
     # 150 points if it has description
-    score += weights[:description] unless object.description.empty?
+    score += weights[:description] unless object.description.blank?
 
     # range to 250 points, for normalized likes ( maxLikes/actualLike => [0..1] )
     likes = learning_object_repository.count_likes(object)
@@ -33,7 +33,7 @@ class ScoreCalculatorWorker
     score += (views / learning_object_repository.max_views)*weights[:views] unless views < 1
 
     downloads = learning_object_repository.count_downloads(object)
-    score += (downloads / learning_object_repository.max_downloads)*weights[:downloads] unless views < 1
+    score += (downloads / learning_object_repository.max_downloads)*weights[:downloads] unless downloads < 1
 
     learning_object_repository.update_property(object, 'score', score)
     end