Commented Issue: Gamma(red, green, blue) didn't works [1340]

When I'm using this code:
```
image.Gamma(GammaRed, GammaGreen, GammaBlue);
```
...actually only GammaRed seems to be working. GammaGreen and GammaBlue are being ignored, and GammaRed being applied to all channels. So this code works exactly like that:
```
image.Gamma(GammaRed);
```
Magick.NET-7.0.0.0009-Q8-AnyCPU-net40-client
P.S. Sorry if my English is bad/
Comments: ** Comment from web user: BufferOverflowx86 **

Thanks!