[PATCH 2/3] refs.c: abort ref search if ref array is empty

From: Brandon Casey <redacted>

The bsearch() implementation on IRIX 6.5 segfaults if it is passed NULL
for the base array argument even if number-of-elements is zero.  So, let's
work around it by detecting an empty array and aborting early.

This is a useful optimization in its own right anyway, since we avoid a
useless allocation and initialization of the ref_entry when the ref array
is empty.

Signed-off-by: Brandon Casey <redacted>
---
 refs.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/refs.c b/refs.c
index c31b461..cbc4c5d 100644
--- a/refs.c
+++ b/refs.c

@@ -110,6 +110,9 @@ static struct ref_entry *search_ref_array(struct ref_array *array, const char *n
 	if (name == NULL)
 		return NULL;
 
+	if (!array->nr)
+		return NULL;
+
 	len = strlen(name) + 1;
 	e = xmalloc(sizeof(struct ref_entry) + len);
 	memcpy(e->name, name, len);

-- 
1.7.7