Merge branch 'jc/range-diff-lazy-setup'

Code clean-up.

* jc/range-diff-lazy-setup:
  remerge-diff: clean up temporary objdir at a central place
  remerge-diff: lazily prepare temporary objdir on demand

builtin/diff.c

@@ -619,7 +619,7 @@ int cmd_diff(int argc, const char **argv, const char *prefix)
 		builtin_diff_combined(&rev, argc, argv,
 				      ent.objects, ent.nr,
 				      first_non_parent);
-	result = diff_result_code(&rev.diffopt);
+	result = diff_result_code(&rev);
 	if (1 < rev.diffopt.skip_stat_unmatch)
 		refresh_index_quietly();
 	release_revisions(&rev);