minor refactor

lib/utils/file_uploader.dart

@@ -239,11 +239,8 @@ class FileUploader {
           )
           ?.value;
 
-      if (pendingEntry == null) {
-        return;
-      }
-
-      if (pendingEntry.file.fileType == FileType.video &&
+      if (pendingEntry == null &&
+          pendingEntry.file.fileType == FileType.video &&
           _currentlyVideoUploading < kMaximumConcurrentVideoUploads) {
         // check if there's any non-video entry which can be queued for upload
         pendingEntry = _queue.entries