[gtk+] GskRenderNode: add missing prototype

[Timm Bäder <baedert src gnome org>]

commit 6c7f1d88854f3f7a91baa31ce9a8e672c3f2a7a3
Author: Timm Bäder <mail baedert org>
Date:   Wed Apr 26 11:06:32 2017 +0200

    GskRenderNode: add missing prototype

 gsk/gskrendernode.h |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/gsk/gskrendernode.h b/gsk/gskrendernode.h
index 08bb87d..43c5d58 100644
--- a/gsk/gskrendernode.h
+++ b/gsk/gskrendernode.h
@@ -166,6 +166,9 @@ GskRenderNode *         gsk_blend_node_new                      (GskRenderNode
                                                                  GskRenderNode            *top,
                                                                  GskBlendMode              blend_mode);
 
+GDK_AVAILABLE_IN_3_92
+GskBlendMode            gsk_blend_node_get_blend_mode           (GskRenderNode            *node);
+
 GDK_AVAILABLE_IN_3_90
 GskRenderNode *         gsk_cross_fade_node_new                 (GskRenderNode            *start,
                                                                  GskRenderNode            *end,