[gitg] diff-view-request-diff: pass null for the binary callback

[Ignacio Casal Quinteiro <icq src gnome org>]

commit cbce110e68c16a59212fda7c5ca0ac35bcaa7fa4
Author: Ignacio Casal Quinteiro <icq gnome org>
Date:   Wed Jul 29 14:59:40 2015 +0200

    diff-view-request-diff: pass null for the binary callback

 libgitg/gitg-diff-view-request-diff.vala |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/libgitg/gitg-diff-view-request-diff.vala b/libgitg/gitg-diff-view-request-diff.vala
index 0363137..b7d25fa 100644
--- a/libgitg/gitg-diff-view-request-diff.vala
+++ b/libgitg/gitg-diff-view-request-diff.vala
@@ -289,6 +289,9 @@ namespace Gitg
                                        return 0;
                                },
 
+                               // FIXME: do we want to handle binary data?
+                               null,
+
                                (delta, hunk) => {
                                        if (cancellable != null && cancellable.is_cancelled())
                                        {