hashtable-based objects: minimum fixups.

Calling hashtable_index from find_object before objs is created
would result in division by zero failure.  Avoid it.

Also the given object name may not be aligned suitably for
unsigned int; avoid dereferencing casted pointer.

Signed-off-by: Junio C Hamano <junkio@cox.net>

diff --git a/object.c b/object.c
index 3259862..c3616da 100644 (file)
--- a/object.c
+++ b/object.c
@@ -13,17 +13,19 @@ int track_object_refs = 1;
 
 static int hashtable_index(const unsigned char *sha1)
 {
-       unsigned int i = *(unsigned int *)sha1;
+       unsigned int i;
+       memcpy(&i, sha1, sizeof(unsigned int));
        return (int)(i % obj_allocs);
 }
 
 static int find_object(const unsigned char *sha1)
 {
-       int i = hashtable_index(sha1);
+       int i;
 
        if (!objs)
                return -1;
 
+       i = hashtable_index(sha1);
        while (objs[i]) {
                if (memcmp(sha1, objs[i]->sha1, 20) == 0)
                        return i;