'svn commit --changelist NO_SUCH_CHANGELIST' should warn

The thread in the URL field starts at this message:

   http://subversion.tigris.org/servlets/ReadMsg?list=dev&msgNo=129303
   From: Karl Fogel <kfogel@red-bean.com>
   To: dev@subversion.tigris.org
   Subject: If no such changelist, show we error?
   Date: Fri, 17 Aug 2007 19:31:33 -0700
   Message-Id: <87bqd5bmka.fsf@red-bean.com>

...and that message sums up the issue like so:

The following IRC conversation says it all:

   <kfogel> Is it a deliberate decision that 'svn commit -m logmsg
            --changelist NON_EXISTENT_CHANGELIST_NAME' does nothing?
            (It doesn't show any error, and it doesn't commit anything,
            even if there are local mods, though of course those local
            mods are not in the named changelist, since it doesn't exist.)
   
   <kfogel> This behavior is true even if you pass --keep-changelist
   
   <epg>    i vote bug; it should error with "no such changelist"
   
   <kfogel> epg: I agree.
   
   <kfogel> Hmm, I'll ask dev@, just in case there was some esoteric
            reason why this behavior was deliberate.

The thread takes some interesting twists and turns, but did agree that this
particular case is a bug.

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