[gimp/gimp-2-10] app: another fix in GimpToolFocus

[Ell <ell src gnome org>]

commit 60db24b655b2bf52dd30b43e21d5f373387cdcd0
Author: Ell <ell_se yahoo com>
Date:   Fri May 15 13:39:30 2020 +0300

    app: another fix in GimpToolFocus
    
    (cherry picked from commit 1171798ca60eee35c6b7f64e82c797501c2d9149)

 app/display/gimptoolfocus.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/app/display/gimptoolfocus.c b/app/display/gimptoolfocus.c
index 525c70e4f2..4f98b7c686 100644
--- a/app/display/gimptoolfocus.c
+++ b/app/display/gimptoolfocus.c
@@ -684,7 +684,7 @@ gimp_tool_focus_motion (GimpToolWidget   *widget,
                   radius = CLAMP (radius, inner_radius, outer_radius);
                 }
 
-              if (outer_radius > inner_radius)
+              if (fabs (outer_radius - inner_radius) > EPSILON)
                 {
                   g_object_set (focus,
                                 "midpoint", MAX ((radius       - inner_radius) /