Fix bug syncing mentions, fix typo, fix SEGV in apu_Status_write

src/model/status.c

@@ -200,6 +200,7 @@ bool status_sync_from_activity_pub( struct status* s, struct ap_activity* act )
 			status_free(parent);
 		}
 	}
+	s->mentions.count = 0;
 	for( int i = 0; i < act->tags.count; ++i ) {
 		struct ap_activity_tag* tag = act->tags.items[i];
 		if( tag->type == aptag_mention ) {

src/view/api/Status.c

@@ -333,7 +333,7 @@ struct json_object_field api_Status_layout[] = {
 		.string_callback = render_source_callback,
 	},
 	{
-		.key = "crated_at",
+		.key = "created_at",
 		.required = true,
 		.offset = offsetof( OBJ_TYPE, published ),
 		.type = &json_field_date_time
@@ -462,6 +462,11 @@ void api_Status_write( struct status* s, FILE* f, int indent )
 		.indent = indent,
 	};
 
+	if( !s ) {
+		fprintf( f, "null" );
+		return;
+	}
+
 	struct status* system_status = NULL;
 	if( s->stub ) {
 		system_status = status_new_system_stub( s );