fix for 3d unsigned char textures
fix for 3d unsigned char textures

TheProjecter/braingl,mhough/braingl,TheProjecter/braingl,mhough/braingl,rdmenezes/fibernavigator2,rdmenezes/fibernavigator2,braingl/braingl,TheProjecter/braingl,braingl/braingl,mhough/braingl,braingl/braingl