Fix warning on win64

src/indexer.c

@@ -632,7 +632,8 @@ static int inject_object(git_indexer_stream *idx, git_oid *id)
 	git_buf buf = GIT_BUF_INIT;
 	git_off_t entry_start;
 	const void *data;
-	size_t len, hdr_len;
+	size_t len;
+	int hdr_len;
 	int error;
 
 	entry = git__calloc(1, sizeof(*entry));
@@ -660,7 +661,7 @@ static int inject_object(git_indexer_stream *idx, git_oid *id)
 	/* And then the compressed object */
 	git_filebuf_write(&idx->pack_file, buf.ptr, buf.size);
 	idx->pack->mwf.size += buf.size;
-	entry->crc = htonl(crc32(entry->crc, (unsigned char *)buf.ptr, buf.size));
+	entry->crc = htonl(crc32(entry->crc, (unsigned char *)buf.ptr, (uInt)buf.size));
 	git_buf_free(&buf);
 
 	/* Write a fake trailer so the pack functions play ball */

src/pack-objects.c

@@ -26,7 +26,7 @@ struct unpacked {
 	git_pobject *object;
 	void *data;
 	struct git_delta_index *index;
-	unsigned int depth;
+	int depth;
 };
 
 struct tree_walk_context {
@@ -659,7 +659,7 @@ static int delta_cacheable(git_packbuilder *pb, unsigned long src_size,
 }
 
 static int try_delta(git_packbuilder *pb, struct unpacked *trg,
-		     struct unpacked *src, unsigned int max_depth,
+		     struct unpacked *src, int max_depth,
 		     unsigned long *mem_usage, int *ret)
 {
 	git_pobject *trg_object = trg->object;

src/pack.c

@@ -372,7 +372,7 @@ static unsigned char *pack_window_open(
  *  - each byte afterwards: low seven bits are size continuation,
  *    with the high bit being "size continues"
  */
-int git_packfile__object_header(unsigned char *hdr, unsigned long size, git_otype type)
+int git_packfile__object_header(unsigned char *hdr, size_t size, git_otype type)
 {
 	unsigned char *hdr_base;
 	unsigned char c;

src/pack.h

@@ -112,7 +112,7 @@ typedef struct git_packfile_stream {
 	git_mwindow *mw;
 } git_packfile_stream;
 
-int git_packfile__object_header(unsigned char *hdr, unsigned long size, git_otype type);
+int git_packfile__object_header(unsigned char *hdr, size_t size, git_otype type);
 
 int git_packfile_unpack_header(
 		size_t *size_p,