[mutter] clutter/stage: Fix picking of rectangles with negative positions

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit 674f52ba747b59a7e72a4a18fea763ee9e617b7c
Author: Sebastian Keller <skeller src gnome org>
Date:   Mon Dec 23 17:53:53 2019 +0100

    clutter/stage: Fix picking of rectangles with negative positions
    
    FLT_MIN is the smallest *positive* number above 0 that can be
    represented as floating point number. If this is used to initialize the
    maximum x/y coordinates of a rectangle, this will always be used if all
    x/y coordinates of the rectangle are negative. This means that picking
    at 0,0 will always be a hit for such rectangles.
    
    Since mutter creates such a window for server side decorations on X11,
    this window will always be picked at 0,0 preventing clicking/hovering
    the activities button in gnome-shell at that coordinate.
    
    Fixes https://gitlab.gnome.org/GNOME/mutter/issues/893

 clutter/clutter/clutter-stage.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/clutter/clutter/clutter-stage.c b/clutter/clutter/clutter-stage.c
index dbd64645a..bead95c4a 100644
--- a/clutter/clutter/clutter-stage.c
+++ b/clutter/clutter/clutter-stage.c
@@ -443,9 +443,9 @@ is_inside_axis_aligned_rectangle (const graphene_point_t *point,
                                   const graphene_point_t *vertices)
 {
   float min_x = FLT_MAX;
-  float max_x = FLT_MIN;
+  float max_x = -FLT_MAX;
   float min_y = FLT_MAX;
-  float max_y = FLT_MIN;
+  float max_y = -FLT_MAX;
   int i;
 
   for (i = 0; i < 3; i++)