gl_flip_quads works not fully

[TheRealOrangus]

when the option "gl_flip_quads" in the file iceball/clsave/config.json is set up to true, it applies for one of the sides only, for each dimension it does affects quads on the top faces, but not the bottom ones the same for left and right sides, and for front and back sides, only 1 of them is affected, the other is not

[dany-on-demand]

https://github.com/iamgreaser/iceball/blob/master/src/gl/render.c#L1065

Looking at the code it seems it should work.

[iamgreaser]

https://github.com/iamgreaser/iceball/blob/master/src/gl/render.c#L1186

It's a bug. Thanks, I'll sort it out.