[libshumate] map-layer: Fix compiler warnings

[Marcus Lundblad <mlundblad src gnome org>]

commit 74d8564b5e3262240f4a8a192c2b4d9d1ab78279
Author: James Westman <james flyingpimonster net>
Date:   Sat Apr 23 15:36:23 2022 -0500

    map-layer: Fix compiler warnings
    
    Some compilers helpfully point out that we're passing a float to the integer
    abs() function, but in this case we do want to convert to int anyway, so add a
    cast.

 shumate/shumate-map-layer.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)
---
diff --git a/shumate/shumate-map-layer.c b/shumate/shumate-map-layer.c
index 7d906b1..800105d 100644
--- a/shumate/shumate-map-layer.c
+++ b/shumate/shumate-map-layer.c
@@ -219,12 +219,12 @@ recompute_grid (ShumateMapLayer *self)
   double rotation = shumate_viewport_get_rotation (viewport);
 
   int size_x = MAX (
-    abs (cos (rotation) *  width/2.0 - sin (rotation) * height/2.0),
-    abs (cos (rotation) * -width/2.0 - sin (rotation) * height/2.0)
+    abs ((int) (cos (rotation) *  width/2.0 - sin (rotation) * height/2.0)),
+    abs ((int) (cos (rotation) * -width/2.0 - sin (rotation) * height/2.0))
   );
   int size_y = MAX (
-    abs (sin (rotation) *  width/2.0 + cos (rotation) * height/2.0),
-    abs (sin (rotation) * -width/2.0 + cos (rotation) * height/2.0)
+    abs ((int) (sin (rotation) *  width/2.0 + cos (rotation) * height/2.0)),
+    abs ((int) (sin (rotation) * -width/2.0 + cos (rotation) * height/2.0))
   );
 
   // This is the (column, row) of the top left tile