image: Fix crash when using llight themes and gif images. Closes
@@ -15,6 +15,7 @@ def imagemagick(color_count, img, magick_command):
"""Call Imagemagick to generate a scheme."""
flags = ["-resize", "25%", "-colors", str(color_count),
"-unique-colors", "txt:-"]
+ img += "[0]"
return subprocess.check_output([*magick_command, img, *flags]).splitlines()
