Merge pull request #3902 from wb9688/null-description

Check for description == null

app/src/main/java/org/schabi/newpipe/fragments/detail/VideoDetailFragment.java

@@ -1018,7 +1018,7 @@ public class VideoDetailFragment extends BaseStateFragment<StreamInfo>
     }
 
     private void prepareDescription(final Description description) {
-        if (TextUtils.isEmpty(description.getContent())
+        if (description == null || TextUtils.isEmpty(description.getContent())
                 || description == Description.emptyDescription) {
             return;
         }