wrong inter_channels in mobilenetv3_seg.py

[nieyan]

Lightweight-Segmentation/light/model/mobilenetv3_seg.py

Line 17 in 71bf91f

inter_channels = 40 if mode == 'large' else 24

It should be:
inter_channels = 112 if mode == 'large' else 24

by the way, mode == 'small' might be wrong too