fix bug in valid_bbox check

Summary: In case the height/width is None, the original version will cause a crash. So adding additional check to bypass this issue.

Reviewed By: ppwwyyxx

Differential Revision: D29807853

fbshipit-source-id: b2b1a7edb52b7911da79a11329d4cf93f343c279

d2go/data/extended_coco.py

@@ -191,7 +191,7 @@ def convert_to_dict_list(image_root, id_map, imgs, anns, dataset_name=None):
             bbox_object = obj.get("bbox", None)
             if bbox_object is not None and "bbox_mode" in obj:
                 bbox_object = BoxMode.convert(bbox_object, obj["bbox_mode"], BoxMode.XYWH_ABS)
-            if "width" in record and "height" in record and (not valid_bbox(bbox_object, record["width"], record["height"])):
+            if record.get("width") and record.get("height") and not valid_bbox(bbox_object, record["width"], record["height"]):
                 num_instances_without_valid_bounding_box += 1
                 continue