[shotwell] Fix compiling with older valac

[Jens Georg <jensgeorg src gnome org>]

commit 5e9053bb76999178f6ae27f011c4a3f90325512e
Author: Jens Georg <mail jensge org>
Date:   Mon Nov 27 20:32:35 2017 +0100

    Fix compiling with older valac

 .../shotwell/FlickrPublishingAuthenticator.vala    |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/plugins/authenticator/shotwell/FlickrPublishingAuthenticator.vala 
b/plugins/authenticator/shotwell/FlickrPublishingAuthenticator.vala
index 7db90b3..97629ed 100644
--- a/plugins/authenticator/shotwell/FlickrPublishingAuthenticator.vala
+++ b/plugins/authenticator/shotwell/FlickrPublishingAuthenticator.vala
@@ -69,7 +69,7 @@ namespace Publishing.Authenticator.Shotwell.Flickr {
             this.auth_code = form_data.lookup("oauth_verifier");
 
             var response = "";
-            var mins = new MemoryInputStream.from_data(response.data);
+            var mins = new MemoryInputStream.from_data(response.data, null);
             request.finish(mins, -1, "text/plain");
         }
     }