Avoid potential 'devision by zero' situation, when chunk_size is not set and queue is restarted in the middle of upload. Address #1067.
Avoid potential 'devision by zero' situation, when chunk_size is not set and queue is restarted in the middle of upload. Address #1067.

vitr/fend005-plupload,envato/plupload,moxiecode/plupload,vitr/fend005-plupload,envato/plupload,moxiecode/plupload