[PATCH] revision: fix missing null for freed memory

[Emily M Klassen <forivall@gmail.com>]

"git log --graph --no-graph" missed cleaning up the output_prefix and
output_prefix_data pointers. This resulted in a segfault when using "--patch",
"--name-status" or "--name-only", as the output_prefix_data continued to be in
use after free()

Signed-off-by: Emily M Klassen <forivall@gmail.com>
---
I previously reported this a few hours ago, and ended up digging in and figuring
it out. I'll make sure to bottom reply in the follow ups to this patch.

 revision.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/revision.c b/revision.c
index 474fa1e767..84cb028e11 100644
--- a/revision.c
+++ b/revision.c
@@ -2615,6 +2615,8 @@ static int handle_revision_opt(struct rev_info *revs, int argc, const char **arg
 		graph_clear(revs->graph);
 		revs->graph = graph_init(revs);
 	} else if (!strcmp(arg, "--no-graph")) {
+		revs->diffopt.output_prefix = NULL;
+		revs->diffopt.output_prefix_data = NULL;
 		graph_clear(revs->graph);
 		revs->graph = NULL;
 	} else if (!strcmp(arg, "--encode-email-headers")) {
-- 
2.48.1