[geary] Only use Canonical's time format setting when running Unity

[Robert Schroll <rschroll src gnome org>]

commit 456910857e7712bc5e47b3665433d2afc8e19a5a
Author: Robert Schroll <rschroll gmail com>
Date:   Mon Mar 9 22:21:41 2015 -0400

    Only use Canonical's time format setting when running Unity
    
    https://bugzilla.gnome.org/show_bug.cgi?id=745935

 src/client/application/geary-config.vala |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/client/application/geary-config.vala b/src/client/application/geary-config.vala
index 71a148c..21db870 100644
--- a/src/client/application/geary-config.vala
+++ b/src/client/application/geary-config.vala
@@ -79,7 +79,7 @@ public class Configuration {
     private const string TIME_FORMAT_KEY = "time-format";
     public Date.ClockFormat clock_format {
         get {
-            if (indicator_datetime != null) {
+            if (GearyApplication.instance.is_running_unity && indicator_datetime != null) {
                 string format = indicator_datetime.get_string(TIME_FORMAT_KEY);
                 if (format == "12-hour")
                     return Date.ClockFormat.TWELVE_HOURS;