Fix binpkg installation with multiple repositories.

New changes include a modified algorithm of the previous one, which
finally does not fail even with multiple repos, YAY!

Fixed some leaks as well, thanks to valgrind.

--HG--
extra : convert_revision : 3cffe1e9e9e9f7abf225ca3c6643377fc12a94bd

bin/xbps-repo/util.c

@@ -180,7 +180,8 @@ show_pkg_info_from_repolist(prop_object_t obj, void *arg, bool *loop_done)
 	if (pkgdict == NULL) {
 		prop_object_release(dict);
 		free(plist);
-		return XBPS_PKG_ENOTINREPO;
+		errno = ENOENT;
+		return 0;
 	}
 
 	oloc = prop_dictionary_get(dict, "location-remote");