Merged revisions 275182 via svnmerge from

https://origsvn.digium.com/svn/asterisk/branches/1.4

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  r275182 | mnicholson | 2010-07-09 13:23:23 -0500 (Fri, 09 Jul 2010) | 2 lines
  
  give a better error message when attempting to unload a module that is not loaded
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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@275186 65c4cc65-6c06-0410-ace0-fbb531ad65f3