fix crash in AccountMediaFragment (again)

app/src/main/java/com/keylesspalace/tusky/fragment/AccountMediaFragment.kt

@@ -36,6 +36,7 @@ import com.keylesspalace.tusky.entity.Attachment
 import com.keylesspalace.tusky.entity.Status
 import com.keylesspalace.tusky.network.MastodonApi
 import com.keylesspalace.tusky.util.ThemeUtils
+import com.keylesspalace.tusky.util.visible
 import com.keylesspalace.tusky.view.SquareImageView
 import com.keylesspalace.tusky.viewdata.AttachmentViewData
 import com.squareup.picasso.Picasso
@@ -92,7 +93,7 @@ class AccountMediaFragment : BaseFragment(), Injectable {
             if(isAdded) {
                 swipe_refresh_layout.isRefreshing = false
                 progress_bar.visibility = View.GONE
-            }
+
                 val body = response.body()
                 body?.let { fetched ->
                     statuses.addAll(0, fetched)
@@ -102,7 +103,8 @@ class AccountMediaFragment : BaseFragment(), Injectable {
                         result.addAll(AttachmentViewData.list(status))
                     }
                     adapter.addTop(result)
-                nothing_message.visibility = if (statuses.isEmpty()) View.VISIBLE else View.GONE
+                    nothing_message.visible(statuses.isEmpty())
+                }
             }
         }
     }