xbps-repo: if fetching info from remote repo for the 'show' and 'show-files'

targets and the binary package exists in cachedir, use it.

--HG--
extra : convert_revision : xtraeme%40gmail.com-20091128022129-y6y2tr0vtvy2w745

bin/xbps-bin/install.c

@@ -121,7 +121,7 @@ download_package_list(prop_object_iterator_t iter)
 		    "filename-sha256", &sha256))
 			return errno;
 
-		lbinfile = xbps_get_binpkg_local_path(obj);
+		lbinfile = xbps_get_binpkg_local_path(obj, repoloc);
 		if (lbinfile == NULL)
 			return errno;