[metacity] frames: avoid implicit conversion warnings

[Alberts Muktupāvels <muktupavels src gnome org>]

commit 6c8a86bc4c5e5b2a76bab28d1a0b124dd6915144
Author: Alberts Muktupāvels <alberts muktupavels gmail com>
Date:   Sun Mar 11 12:58:26 2018 +0200

    frames: avoid implicit conversion warnings
    
    warning: implicit conversion from ‘float’ to ‘double’ to match
    other operand of binary expression [-Wdouble-promotion]

 src/ui/frames.c |    8 ++++----
 1 files changed, 4 insertions(+), 4 deletions(-)
---
diff --git a/src/ui/frames.c b/src/ui/frames.c
index 9db27bf..a705ba5 100644
--- a/src/ui/frames.c
+++ b/src/ui/frames.c
@@ -940,7 +940,7 @@ get_visible_region (MetaFrames        *frames,
   if (fgeom->top_left_corner_rounded_radius != 0)
     {
       const int corner = fgeom->top_left_corner_rounded_radius;
-      const float radius = sqrt(corner) + corner;
+      const gdouble radius = sqrt (corner) + corner;
       int i;
 
       for (i=0; i<corner; i++)
@@ -958,7 +958,7 @@ get_visible_region (MetaFrames        *frames,
   if (fgeom->top_right_corner_rounded_radius != 0)
     {
       const int corner = fgeom->top_right_corner_rounded_radius;
-      const float radius = sqrt(corner) + corner;
+      const gdouble radius = sqrt (corner) + corner;
       int i;
 
       for (i=0; i<corner; i++)
@@ -976,7 +976,7 @@ get_visible_region (MetaFrames        *frames,
   if (fgeom->bottom_left_corner_rounded_radius != 0)
     {
       const int corner = fgeom->bottom_left_corner_rounded_radius;
-      const float radius = sqrt(corner) + corner;
+      const gdouble radius = sqrt (corner) + corner;
       int i;
 
       for (i=0; i<corner; i++)
@@ -994,7 +994,7 @@ get_visible_region (MetaFrames        *frames,
   if (fgeom->bottom_right_corner_rounded_radius != 0)
     {
       const int corner = fgeom->bottom_right_corner_rounded_radius;
-      const float radius = sqrt(corner) + corner;
+      const gdouble radius = sqrt (corner) + corner;
       int i;
 
       for (i=0; i<corner; i++)