additional dc:creator tags are discarded

What steps will reproduce the problem?
1. Import feed with multiple <dc:creator> within each <item>
Example feed: 
<item>
  <title>This is my article</title>
  <link>www.google.com</link>
  <dc:creator>John Doe</dc:creator>
  <dc:creator>Jane Doe</dc:creator>
  <content><p>My article copy goes here</p></content>
</item>

2. Code is as follows

feed = feedparser.parse('http://www.test.com/sample.xml')

for entry in feed.entries:

    item = {
        'authors': entry.authors,
     }
    entries.append(item)
print entries


What is the expected output? What do you see instead?
Expected to see:
>[{'author': [{John Doe}, {Jane Doe}]}] 

Instead see: 
> [{'author': [{}, {} ]}]

What version of the product are you using? On what operating system?
Feedparser 5.1.1 // Mac OS 10.7.3 // Python 2.7.2 // Feed is RSS 2.0 

Please provide any additional information below.
I cannot get multiple authors to parse correctly in v5.1 or v5.1.1, despite 
seeing an apparent patch in Issue #42 that was fixed on Dec 1, 2010. 

Original issue reported on code.google.com by jason.se...@gmail.com on 11 Apr 2012 at 6:27

Start by reproducing the issue with the sample RSS item and the feedparser.parse call, then inspect how entry.authors is populated for repeated dc:creator tags. Done means the resulting authors data retains both John Doe and Jane Doe instead of empty author objects.