[gnome-screensaver] fade: fix fade computation math

[Ray Strode <halfline src gnome org>]

commit 7e2085ab60d144ada580eb91d339332cb94e6811
Author: Ray Strode <rstrode redhat com>
Date:   Wed Mar 21 15:30:06 2012 -0400

    fade: fix fade computation math
    
    commit 44edc03104 changed the fade time out to be less
    than a 1000ms.  Unfortunately, this broke the fade because the
    math for computing the number of fade steps used integer arithmetic,
    and performed a division by a 1000.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=672583

 src/gs-fade.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/gs-fade.c b/src/gs-fade.c
index d135b35..20768b6 100644
--- a/src/gs-fade.c
+++ b/src/gs-fade.c
@@ -726,7 +726,7 @@ gs_fade_start (GSFade *fade,
         if (active_fade) {
                 guint num_steps;
 
-                num_steps = (fade->priv->timeout / 1000) * steps_per_sec;
+                num_steps = (fade->priv->timeout / 1000.) * steps_per_sec;
                 msecs_per_step = 1000 / steps_per_sec;
                 fade->priv->alpha_per_iter = 1.0 / (gdouble)num_steps;