Previously, get-bytes-per-pixel was returning three for RGB24 formats.
However, the Cairo documentation states that RGB24 formats have 32 bits
per pixel. This means that image-surface-get-data was not returning all
of the data for RGB24 formats. Fixed so that now get-bytes-per-pixel
returns four for RGB24 formats.
Previously, get-bytes-per-pixel was returning three for RGB24 formats. However, the Cairo documentation states that RGB24 formats have 32 bits per pixel. This means that image-surface-get-data was not returning all of the data for RGB24 formats. Fixed so that now get-bytes-per-pixel returns four for RGB24 formats.