[gnome-calculator] Another gtksourceview bindings change...

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 67ecaa44ac348df96125e5691806fb209df229b6
Author: Michael Catanzaro <mcatanzaro gnome org>
Date:   Tue Jan 6 15:57:20 2015 -0600

    Another gtksourceview bindings change...
    
    https://bugzilla.gnome.org/show_bug.cgi?id=742415

 src/math-display.vala |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/math-display.vala b/src/math-display.vala
index 6d44d98..91c41c5 100644
--- a/src/math-display.vala
+++ b/src/math-display.vala
@@ -434,7 +434,7 @@ public class CompletionProvider : GLib.Object, Gtk.SourceCompletionProvider
         }
     }
 
-    public virtual bool get_start_iter (Gtk.SourceCompletionContext context, Gtk.SourceCompletionProposal 
proposal, Gtk.TextIter iter)
+    public virtual bool get_start_iter (Gtk.SourceCompletionContext context, Gtk.SourceCompletionProposal 
proposal, out Gtk.TextIter iter)
     {
         return false;
     }