alloc: add repository argument to alloc_object_node

This is a small mechanical change; it doesn't change the
implementation to handle repositories other than the_repository yet.
Use a macro to catch callers passing a repository other than
the_repository at compile time.

Signed-off-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

alloc.c

@@ -73,7 +73,7 @@ void *alloc_tag_node_the_repository(void)
 }
 
 static struct alloc_state object_state;
-void *alloc_object_node(void)
+void *alloc_object_node_the_repository(void)
 {
 	struct object *obj = alloc_node(&object_state, sizeof(union any_object));
 	obj->type = OBJ_NONE;

cache.h

@@ -1772,7 +1772,8 @@ extern void *alloc_tree_node_the_repository(void);
 extern void *alloc_commit_node_the_repository(void);
 #define alloc_tag_node(r) alloc_tag_node_##r()
 extern void *alloc_tag_node_the_repository(void);
-extern void *alloc_object_node(void);
+#define alloc_object_node(r) alloc_object_node_##r()
+extern void *alloc_object_node_the_repository(void);
 extern void alloc_report(void);
 extern unsigned int alloc_commit_index(void);
 

object.c

@@ -180,7 +180,7 @@ struct object *lookup_unknown_object(const unsigned char *sha1)
 	struct object *obj = lookup_object(sha1);
 	if (!obj)
 		obj = create_object(the_repository, sha1,
-				    alloc_object_node());
+				    alloc_object_node(the_repository));
 	return obj;
 }