Fix changelog.

debian/changelog

@@ -11,7 +11,7 @@ apt (0.7.26~exp13) UNRELEASEDexperimental; urgency=low
   [ Julian Andres Klode ]
   * apt-pkg/depcache.cc:
     - Only try upgrade for Breaks if there is a newer version, otherwise
-      handle it as Conflicts (by removing it) (helps for #591881).
+      handle it as Conflicts (by removing it) (helps for #591882).
 
  -- Michael Vogt <michael.vogt@ubuntu.com>  Fri, 30 Jul 2010 17:37:14 +0200