hashmap_entry_init takes "struct hashmap_entry *"

C compilers do type checking to make life easier for us.  So
rely on that and update all hashmap_entry_init callers to take
"struct hashmap_entry *" to avoid future bugs while improving
safety and readability.

Signed-off-by: Eric Wong <e@80x24.org>
Reviewed-by: Derrick Stolee <stolee@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

refs.c

@@ -1796,7 +1796,7 @@ static struct ref_store_hash_entry *alloc_ref_store_hash_entry(
 	struct ref_store_hash_entry *entry;
 
 	FLEX_ALLOC_STR(entry, name, name);
-	hashmap_entry_init(entry, strhash(name));
+	hashmap_entry_init(&entry->ent, strhash(name));
 	entry->refs = refs;
 	return entry;
 }