[PATCH] bisect: save heap memory. allocate only the required amount

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find and allocate the required amount instead of
allocating extra 100 bytes

Signed-off-by: Arjun Sreedharan <arjun024@xxxxxxxxx>
---
 bisect.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/bisect.c b/bisect.c
index d6e851d..a52631e 100644
--- a/bisect.c
+++ b/bisect.c
@@ -215,12 +215,16 @@ static struct commit_list *best_bisection_sorted(struct commit_list *list, int n
 	}
 	qsort(array, cnt, sizeof(*array), compare_commit_dist);
 	for (p = list, i = 0; i < cnt; i++) {
-		struct name_decoration *r = xmalloc(sizeof(*r) + 100);
+		struct strbuf name = STRBUF_INIT;	
+		struct name_decoration *r;
 		struct object *obj = &(array[i].commit->object);
 
-		sprintf(r->name, "dist=%d", array[i].distance);
+		strbuf_addf(&name, "dist=%d", array[i].distance);
+		r = xmalloc(sizeof(*r) + name.len);
+		memcpy(r->name, name.buf, name.len + 1);
 		r->next = add_decoration(&name_decoration, obj, r);
 		p->item = array[i].commit;
+		strbuf_release(&name);
 		p = p->next;
 	}
 	if (p)
-- 
1.7.11.7

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