revisions API: have release_revisions() release "prune_data"

Extend the the release_revisions() function so that it frees the
"prune_data" in the "struct rev_info". This means that any code that
calls "release_revisions()" already can get rid of adjacent calls to
clear_pathspec().

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

add-interactive.c

@@ -568,8 +568,6 @@ static int get_modified_files(struct repository *r,
 			run_diff_files(&rev, 0);
 		}
 
-		if (ps)
-			clear_pathspec(&rev.prune_data);
 		release_revisions(&rev);
 	}
 	hashmap_clear_and_free(&s.file_map, struct pathname_entry, ent);

builtin/add.c

@@ -142,7 +142,6 @@ int add_files_to_cache(const char *prefix,
 	rev.diffopt.flags.override_submodule_config = 1;
 	rev.max_count = 0; /* do not compare unmerged paths with stage #2 */
 	run_diff_files(&rev, DIFF_RACY_IS_MODIFIED);
-	clear_pathspec(&rev.prune_data);
 	release_revisions(&rev);
 	return !!data.add_errors;
 }

builtin/stash.c

@@ -1064,7 +1064,6 @@ static int check_changes_tracked_files(const struct pathspec *ps)
 	}
 
 done:
-	clear_pathspec(&rev.prune_data);
 	release_revisions(&rev);
 	return ret;
 }
@@ -1276,7 +1275,6 @@ static int stash_working_tree(struct stash_info *info, const struct pathspec *ps
 
 done:
 	discard_index(&istate);
-	clear_pathspec(&rev.prune_data);
 	release_revisions(&rev);
 	strbuf_release(&diff_output);
 	remove_path(stash_index_path.buf);

diff-lib.c

@@ -641,7 +641,6 @@ int do_diff_cache(const struct object_id *tree_oid, struct diff_options *opt)
 
 	if (diff_cache(&revs, tree_oid, NULL, 1))
 		exit(128);
-	clear_pathspec(&revs.prune_data);
 	release_revisions(&revs);
 	return 0;
 }

revision.c

@@ -2949,6 +2949,7 @@ void release_revisions(struct rev_info *revs)
 	object_array_clear(&revs->pending);
 	release_revisions_cmdline(&revs->cmdline);
 	list_objects_filter_release(&revs->filter);
+	clear_pathspec(&revs->prune_data);
 	release_revisions_mailmap(revs->mailmap);
 	free_grep_patterns(&revs->grep_filter);
 }

wt-status.c

@@ -616,7 +616,6 @@ static void wt_status_collect_changes_worktree(struct wt_status *s)
 	rev.diffopt.rename_score = s->rename_score >= 0 ? s->rename_score : rev.diffopt.rename_score;
 	copy_pathspec(&rev.prune_data, &s->pathspec);
 	run_diff_files(&rev, 0);
-	clear_pathspec(&rev.prune_data);
 	release_revisions(&rev);
 }
 
@@ -664,7 +663,6 @@ static void wt_status_collect_changes_index(struct wt_status *s)
 	copy_pathspec(&rev.prune_data, &s->pathspec);
 	run_diff_index(&rev, 1);
 	release_revisions(&rev);
-	clear_pathspec(&rev.prune_data);
 }
 
 static int add_file_to_list(const struct object_id *oid,