[gnome-maps] transitPlan: Export default color constants from module

[Marcus Lundblad <mlundblad src gnome org>]

commit bd1472b1ebfa891c423074d83c815ac76d17322e
Author: Marcus Lundblad <ml update uu se>
Date:   Sun Oct 1 21:24:58 2017 +0200

    transitPlan: Export default color constants from module
    
    https://bugzilla.gnome.org/show_bug.cgi?id=788407

 src/transitPlan.js |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/src/transitPlan.js b/src/transitPlan.js
index 26d08a5..d9cd573 100644
--- a/src/transitPlan.js
+++ b/src/transitPlan.js
@@ -81,8 +81,8 @@ function _printTimeWithTZOffset(time, offset) {
         return date.format('%r');
 }
 
-const DEFAULT_ROUTE_COLOR = '4c4c4c';
-const DEFAULT_ROUTE_TEXT_COLOR = 'ffffff';
+var DEFAULT_ROUTE_COLOR = '4c4c4c';
+var DEFAULT_ROUTE_TEXT_COLOR = 'ffffff';
 
 var Plan = new Lang.Class({
     Name: 'Plan',