[cheese] Fix build with new vala

[Javier Jardón Cabezas <jjardon src gnome org>]

commit d3cf06a1c53891099dbbedb580d1ac66bcd3b615
Author: Javier Jardón <jjardon gnome org>
Date:   Sun Feb 26 11:55:42 2017 +0000

    Fix build with new vala
    
    vala change:
    https://git.gnome.org/browse/vala/commit/?id=ddca99ea2f25b9a734831589ec209df5322520a4
    
    Build error:
    http://build.gnome.org/continuous/buildmaster/builds/2017/02/26/48/build/log-cheese.txt

 src/cheese-preferences.vala |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)
---
diff --git a/src/cheese-preferences.vala b/src/cheese-preferences.vala
index 8a3eb7e..f56af7e 100644
--- a/src/cheese-preferences.vala
+++ b/src/cheese-preferences.vala
@@ -455,7 +455,12 @@ public PreferencesDialog (Cheese.Camera camera)
         else
           this.hide ();
       }
+
+#if VALA_0_36
+      camera_model.remove (ref iter);
+#else
       camera_model.remove (iter);
+#endif
 
       if (camera_model.iter_n_children (null) <= 1)
         source_combo.sensitive = false;