git-cvsserver: fix call to nonexistant cleanupWorkDir()

git-cvsserver.perl contained a single call to a nonexistant function
cleanupWorkDir(). This was obviously a typo for cleanupWorkTree().

Signed-off-by: Lars Noschinski <lars@public.noschinski.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

git-cvsserver.perl

@@ -1884,7 +1884,7 @@ sub req_annotate
     }
 
     # done; get out of the tempdir
-    cleanupWorkDir();
+    cleanupWorkTree();
 
     print "ok\n";