[PATCH] fix memleak from tree pathspec in git-blame

[Junio C Hamano <gitster@pobox.com>]

We repeatedly run diff-tree while finding code movements.  The
pathspec data is changed into a list of paths and their lengths
for quicker access by diff_tree_setup_paths(), and you need to
release the extra memory when you are done using that pathspec
data.

Not releasing it is not a problem for "git log -- path" (or its
plumbing equivalent "git rev-list -- paths"), because the
pathspec never changes during the traversal, but it was
noticeable for blame especially with -C -C.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
---

 builtin-blame.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/builtin-blame.c b/builtin-blame.c
index dc88a95..aace08c 100644
--- a/builtin-blame.c
+++ b/builtin-blame.c
@@ -380,6 +380,7 @@ static struct origin *find_origin(struct scoreboard *sb,
 		}
 	}
 	diff_flush(&diff_opts);
+	diff_tree_release_paths(&diff_opts);
 	if (porigin) {
 		/*
 		 * Create a freestanding copy that is not part of
@@ -436,6 +437,7 @@ static struct origin *find_rename(struct scoreboard *sb,
 		}
 	}
 	diff_flush(&diff_opts);
+	diff_tree_release_paths(&diff_opts);
 	return porigin;
 }
 
@@ -1157,6 +1159,7 @@ static int find_copy_in_parent(struct scoreboard *sb,
 		}
 	}
 	diff_flush(&diff_opts);
+	diff_tree_release_paths(&diff_opts);
 
 	return retval;
 }