[folks] Declare folks_small_set_copy properly

[Simon McVittie <smcv src gnome org>]

commit f18d26283c594efdcfee6cbc8b09855f0d65b4ad
Author: Simon McVittie <simon mcvittie collabora co uk>
Date:   Thu Apr 4 18:30:18 2013 +0100

    Declare folks_small_set_copy properly
    
    Bug: https://bugzilla.gnome.org/show_bug.cgi?id=687161
    Signed-off-by: Simon McVittie <simon mcvittie collabora co uk>
    Reviewed-by: Philip Withnall <philip tecnocode co uk>

 folks/small-set.h |    8 ++++++++
 1 files changed, 8 insertions(+), 0 deletions(-)
---
diff --git a/folks/small-set.h b/folks/small-set.h
index 1b2760d..e61f387 100644
--- a/folks/small-set.h
+++ b/folks/small-set.h
@@ -68,6 +68,14 @@ folks_small_set_empty (GType item_type,
     GBoxedCopyFunc item_dup,
     GDestroyNotify item_free);
 
+FolksSmallSet *folks_small_set_copy (GeeIterable *iterable,
+    GeeHashDataFunc item_hash,
+    gpointer item_hash_data,
+    GDestroyNotify item_hash_data_free,
+    GeeEqualDataFunc item_equals,
+    gpointer item_equals_data,
+    GDestroyNotify item_equals_data_free);
+
 G_END_DECLS
 
 #endif