ETC1 fix for npot textures
ETC1 fix for npot textures

Simple fix that replaces width by pitch where needed to avoid misalignment
due to the difference between pitch and width in npot textures.

Change-Id: I7acddc28fae21dddf870a6ef80ac7984cfaf8e0f
Reviewed-on: https://swiftshader-review.googlesource.com/3931
Tested-by: Alexis Hétu <1c7141772178a7e80858c3db5052b328076f08f4@google.com>
Reviewed-by: Nicolas Capens <0612353e1fcebbfd4b302d9337447ca0cdfa9122@google.com>

bkaradzic/SwiftShader,google/swiftshader,bkaradzic/SwiftShader,google/swiftshader,bkaradzic/SwiftShader,google/swiftshader,bkaradzic/SwiftShader,bkaradzic/SwiftShader