[gitg] Use https to get avatars

[Jesse van den Kieboom <jessevdk src gnome org>]

commit 1ac57cec3ec0b340cb3df24a22c59e1e2b9d32fe
Author: Jesse van den Kieboom <jessevdk gnome org>
Date:   Tue Dec 29 23:57:54 2015 +0100

    Use https to get avatars

 libgitg/gitg-avatar-cache.vala |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/libgitg/gitg-avatar-cache.vala b/libgitg/gitg-avatar-cache.vala
index bc38d89..e035617 100644
--- a/libgitg/gitg-avatar-cache.vala
+++ b/libgitg/gitg-avatar-cache.vala
@@ -53,7 +53,7 @@ public class Gitg.AvatarCache : Object
                        return d_cache[ckey];
                }
 
-               var gravatar = @"http://www.gravatar.com/avatar/$(id)?d=404&s=$(size)";
+               var gravatar = @"https://www.gravatar.com/avatar/$(id)?d=404&s=$(size)";
                var gfile = File.new_for_uri(gravatar);
 
                var pixbuf = yield read_avatar_from_file(id, gfile, size, cancellable);