[Fix] Fix numpy ValueError in update_infos_to_v2.py

[ZLTJohn]

Motivation

Fix numpy value assignment error. I was updating an info.pkl generated from an older mmdet3d of v1.0.0rc2, via command
python tools/dataset_converters/update_infos_to_v2.py --dataset nuscenes --pkl-path ./data/nus_rc2/nuscenes_infos_val.pkl --out-dir ./data/nus_v2
I encountered this error:
File "tools/dataset_converters/update_infos_to_v2.py", line 336, in update_nuscenes_infos lidar2sensor[:3, 3] = -1 * np.matmul(rot.T, trans.reshape(3, 1))
ValueError: could not broadcast input array from shape (3,1) into shape (3,)

Modification

In update_infos_to_v2.py, I simply changed all lidar2sensor[:3, 3] = -1 * np.matmul(rot.T, trans.reshape(3, 1)) to lidar2sensor[:3, 3:4] = -1 * np.matmul(rot.T, trans.reshape(3, 1))

[CLAassistant]

All committers have signed the CLA.

[jason102811]

Dear zltjohn,
First of all, we want to express our gratitude for your significant PR in the MMDet project. Your contribution is highly appreciated, and we are grateful for your efforts in helping improve this open-source project during your personal time. We believe that many developers will benefit from your PR.
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Best regards！ @ZLTJohn