[gimp] plug-ins: replace gimp_checks_get_shades() by gimp_checks_get_colors().

[Jehan <jehanp src gnome org>]

commit 8d61c4211f6d3c0a989469ecda98f09a6ab33aa2
Author: Jehan <jehan girinstud io>
Date:   Sat May 14 17:31:09 2022 +0200

    plug-ins: replace gimp_checks_get_shades() by gimp_checks_get_colors().
    
    The animation playback now follows user preferences for checkboard
    rendering.
    Also fixing a small bug there, as the GIMP_CHECK_SIZE_SMALL_CHECKS was
    the wrong type (it needed a check type, not a check size parameter).

 plug-ins/common/animation-play.c | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)
---
diff --git a/plug-ins/common/animation-play.c b/plug-ins/common/animation-play.c
index b4f295cf20..70381e1470 100644
--- a/plug-ins/common/animation-play.c
+++ b/plug-ins/common/animation-play.c
@@ -490,14 +490,11 @@ repaint_da (GtkWidget *darea,
             gpointer   data)
 {
   cairo_pattern_t *check;
-  GimpRGB          light;
-  GimpRGB          dark;
+  GimpRGB          light = *(gimp_check_custom_color1 ());
+  GimpRGB          dark  = *(gimp_check_custom_color2 ());;
   guchar           l, d;
 
-  gimp_checks_get_shades (GIMP_CHECK_SIZE_SMALL_CHECKS, &l, &d);
-
-  gimp_rgba_set_uchar (&light, l, l, l, 255);
-  gimp_rgba_set_uchar (&dark,  d, d, d, 255);
+  gimp_checks_get_colors (gimp_check_type (), &light, &dark);
 
   check = gimp_cairo_checkerboard_create (cr, 32, &light, &dark);