Fix T60204: Crash when opening a File

Missing code from 3d083f37. Need to ensure that ID properties
are properly allocated and restored on read.

source/blender/blenloader/intern/readfile.c

@@ -6501,9 +6501,9 @@ static void direct_link_scene(FileData *fd, Scene *sce)
 
 	if (sce->master_collection) {
 		sce->master_collection = newdataadr(fd, sce->master_collection);
-		direct_link_collection(fd, sce->master_collection);
 		/* Needed because this is an ID outside of Main. */
-		sce->master_collection->id.py_instance = NULL;
+		direct_link_id(fd, &sce->master_collection->id);
+		direct_link_collection(fd, sce->master_collection);
 	}
 
 	/* insert into global old-new map for reading without UI (link_global accesses it again) */