Fixed detection and validate(recall, map) for .png and .bmp images.

AlexeyAB

2018-04-19 c2c8595b083ec3586a99bb913b8a986e81e3a42a

 build/darknet/x64/resnet50_yolo.cfg

@@ -1,6 +1,6 @@
[net]
batch=64
subdivisions=8
subdivisions=32
height=416
width=416
channels=3
@@ -517,4 +517,4 @@

absolute=1
thresh = .6
random=0
random=1