[shotwell/shotwell-0.26] publishers: Properly escape urlencoded payload

[Jens Georg <jensgeorg src gnome org>]

commit c4c4eb2f4a9d8ffdcd67cf6637ceb68ce71a935a
Author: Jens Georg <mail jensge org>
Date:   Sat Feb 10 21:12:32 2018 +0100

    publishers: Properly escape urlencoded payload
    
    https://bugzilla.gnome.org/show_bug.cgi?id=718742

 plugins/common/RESTSupport.vala |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/plugins/common/RESTSupport.vala b/plugins/common/RESTSupport.vala
index f06473c..1a152b0 100644
--- a/plugins/common/RESTSupport.vala
+++ b/plugins/common/RESTSupport.vala
@@ -137,7 +137,7 @@ public class Argument {
     }
 
     public string to_string () {
-        return "%s=%s".printf (this.key, this.value);
+        return "%s=%s".printf (Uri.escape (this.key), Uri.escape (this.value));
     }
 }