gainmap_weight was calculated incorrectly

[hushhw]

In jpegc.cpp, it seems that the calculation of gainmap_weight is incorrect

gainmap_weight = CLIP3(0.0f, gainmap_weight, 1.0f);

The range of gainmap_weight should be from 0 to 1, but it seems like the gainmap_weight and 0.0f have been reversed here

[ram-mohan]

thank you. above pull request should resolve this.

[kmilos]

@ram-mohan @DichenZhang1 The same here?

libultrahdr/lib/src/gpu/applygainmap_gl.cpp

Line 414 in 5ed39d6

gainmap_weight = CLIP3(0.0f, gainmap_weight, 1.0f);