[mutter/gnome-3-36] screen-cast/src: Use G_USEC_PER_SEC instead of 1000000

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

commit 0c6ac287e6da91ba76bf3958befef4bec6ed28f6
Author: Jonas Ådahl <jadahl gmail com>
Date:   Wed Jul 8 15:08:23 2020 +0200

    screen-cast/src: Use G_USEC_PER_SEC instead of 1000000
    
    https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1351

 src/backends/meta-screen-cast-stream-src.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)
---
diff --git a/src/backends/meta-screen-cast-stream-src.c b/src/backends/meta-screen-cast-stream-src.c
index 8412642b91..070c67a93f 100644
--- a/src/backends/meta-screen-cast-stream-src.c
+++ b/src/backends/meta-screen-cast-stream-src.c
@@ -515,8 +515,9 @@ meta_screen_cast_stream_src_maybe_record_frame (MetaScreenCastStreamSrc  *src,
       int64_t min_interval_us;
       int64_t time_since_last_frame_us;
 
-      min_interval_us = ((1000000 * priv->video_format.max_framerate.denom) /
-                         priv->video_format.max_framerate.num);
+      min_interval_us =
+        ((G_USEC_PER_SEC * priv->video_format.max_framerate.denom) /
+         priv->video_format.max_framerate.num);
 
       time_since_last_frame_us = now_us - priv->last_frame_timestamp_us;
       if (time_since_last_frame_us < min_interval_us)