Change the signature of get_object_entry for future use from Rust

src/cinnabar-fast-import.c

@@ -113,20 +113,21 @@ off_t real_find_pack_entry_one(const unsigned char *sha1,
 off_t find_pack_entry_one(const unsigned char *sha1, struct packed_git *p)
 {
 	if (p == pack_data) {
-		struct object_entry *oe = get_object_entry(sha1);
+		struct object_id oid;
+		struct object_entry *oe;
+		hashcpy(oid.hash, sha1);
+		oid.algo = GIT_HASH_SHA1;
+		oe = get_object_entry(&oid);
 		if (oe && oe->idx.offset > 1 && oe->pack_id == pack_id)
 			return oe->idx.offset;
 		return 0;
 	}
 	return real_find_pack_entry_one(sha1, p);
 }
 
-void *get_object_entry(const unsigned char *sha1)
+struct object_entry *get_object_entry(const struct object_id *oid)
 {
-	struct object_id oid;
-	hashcpy(oid.hash, sha1);
-	oid.algo = GIT_HASH_SHA1;
-	return find_object(&oid);
+	return find_object((struct object_id*)oid);
 }
 
 /* Mostly copied from fast-import.c's cmd_main() */

src/cinnabar-fast-import.h

@@ -12,11 +12,12 @@ struct object_id;
 struct hg_object_id;
 struct cinnabar_notes_tree;
 struct rev_chunk;
+struct object_entry;
 
 int maybe_handle_command(struct reader *helper_input, int helper_output,
                          const char *command, struct string_list *args);
 
-void *get_object_entry(const unsigned char *sha1);
+struct object_entry *get_object_entry(const struct object_id *oid);
 
 void store_git_tree(struct strbuf *tree_buf,
                     const struct object_id *reference,

src/hg-data.c

@@ -80,7 +80,7 @@ void hg_file_load(struct hg_file *result, const struct hg_object_id *oid)
 	free(content);
 
 	// Note this duplicates work read_object_file already did.
-	result->content_oe = get_object_entry(note->hash);
+	result->content_oe = get_object_entry(note);
 
 	_hg_file_split(result, metadata_len);
 }