revisions API users: use release_revisions() for "prune_data" users

Use release_revisions() for users of "struct rev_list" that reach into
the "struct rev_info" and clear the "prune_data" already.

In a subsequent commit we'll teach release_revisions() to clear this
itself, but in the meantime let's invoke release_revisions() here to
clear anything else we may have missed, and for reasons of having
consistent boilerplate.

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

wt-status.c

@@ -617,6 +617,7 @@ static void wt_status_collect_changes_worktree(struct wt_status *s)
 	copy_pathspec(&rev.prune_data, &s->pathspec);
 	run_diff_files(&rev, 0);
 	clear_pathspec(&rev.prune_data);
+	release_revisions(&rev);
 }
 
 static void wt_status_collect_changes_index(struct wt_status *s)