[gnome-control-center] display: Fix night light minute selection

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

commit 77aaf3146bebde404bd22125e234c8bce85e608b
Author: danielps <d nielps me>
Date:   Fri Jan 26 23:45:53 2018 +0100

    display: Fix night light minute selection
    
    The night light schedule dialog stores the time as a single floating
    point value, which is then converted into hours and minutes for the
    time selection fields.
    
    Previously, the minutes were calculated using the remainder of the
    stored value and the hours. This caused undesired behaviour when the
    hour field was set to zero, as fmod(value, 0) returns NaN. As a result,
    the user was not able to set the time between 00:00 and 00:59.
    
    This patch rewrites the time retrieval logic using modf.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=792944

 panels/display/cc-night-light-dialog.c |    7 +------
 1 files changed, 1 insertions(+), 6 deletions(-)
---
diff --git a/panels/display/cc-night-light-dialog.c b/panels/display/cc-night-light-dialog.c
index 2fb515b..a2bbc68 100644
--- a/panels/display/cc-night-light-dialog.c
+++ b/panels/display/cc-night-light-dialog.c
@@ -119,7 +119,7 @@ dialog_adjustments_set_frac_hours (CcNightLightDialog *self,
 
   /* display the right thing for AM/PM */
   is_24h = self->clock_format == G_DESKTOP_CLOCK_FORMAT_24H;
-  hours = floor (value);
+  mins = modf (value, &hours) * 60.f;
   if (!is_24h)
     {
       if (hours > 12)
@@ -137,11 +137,6 @@ dialog_adjustments_set_frac_hours (CcNightLightDialog *self,
           is_pm = TRUE;
         }
     }
-  if (value > 0.f)
-    {
-      mins = fmod (value, hours) * 60.f;
-      mins = fmod (mins, 60.f);
-    }
   g_debug ("setting adjustment %.3f to %.0f:%02.0f", value, hours, mins);
 
   self->ignore_value_changed = TRUE;