[mutter] clutter/blur: Fix shader loop

[Marge Bot <marge-bot src gnome org>]

commit 5fca8f231ae301643b9c320eb21403a1734a40f0
Author: Georges Basile Stavracas Neto <georges stavracas gmail com>
Date:   Thu Dec 17 01:54:44 2020 -0300

    clutter/blur: Fix shader loop
    
    We must iterate at least once, and i starts at 1, so use
    less-or-equal in the for-loop.
    
    Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1646>

 clutter/clutter/clutter-blur.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/clutter/clutter/clutter-blur.c b/clutter/clutter/clutter-blur.c
index 9a8153e8f9..abc8d3c147 100644
--- a/clutter/clutter/clutter-blur.c
+++ b/clutter/clutter/clutter-blur.c
@@ -86,7 +86,7 @@ static const char *gaussian_blur_glsl =
 "                                                                          \n"
 "  int n_steps = int (ceil (3 * sigma));                                   \n"
 "                                                                          \n"
-"  for (int i = 1; i < n_steps; i += 2) {                                  \n"
+"  for (int i = 1; i <= n_steps; i += 2) {                                 \n"
 "    float coefficient_subtotal = gauss_coefficient.x;                     \n"
 "    gauss_coefficient.xy *= gauss_coefficient.yz;                         \n"
 "    coefficient_subtotal += gauss_coefficient.x;                          \n"