fix repo.show doesn't have changelog parameter

bin/is

@@ -247,7 +247,7 @@ def c_list(parser, args):
             if len(repos) > 0:
                 for reponame in repos:
                     arrow(reponame)
-                    repoman[reponame].show(verbose=args.verbose, changelog=args.changelog)
+                    repoman[reponame].show(verbose=args.verbose)
             else:
                 img, repo = select_image(o, repoman, args.best)
                 img.show(verbose=args.verbose, changelog=args.changelog)

installsystems/image.py

@@ -554,10 +554,7 @@ class PackageImage(Image):
         self._tarball.list(verbose)
         # display changelog
         if changelog or verbose:
-            try:
-                self.changelog.show(int(self.version), verbose)
-            except AttributeError:
-                pass
+            self.changelog.show(int(self.version), verbose)
 
     def check(self, message="Check MD5"):
         '''