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/3931Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>