[gtk+] gsk: Mark internal symbol as static

[Emmanuele Bassi <ebassi src gnome org>]

commit 9442ef055d19a806e59a3be5cd6fb2465d32ac62
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Wed Apr 26 17:27:24 2017 +0100

    gsk: Mark internal symbol as static
    
    Nothing uses this function outside of GskVulkaneRenderPass.

 gsk/gskvulkanrenderpass.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gsk/gskvulkanrenderpass.c b/gsk/gskvulkanrenderpass.c
index 61bb6c7..7b49b18 100644
--- a/gsk/gskvulkanrenderpass.c
+++ b/gsk/gskvulkanrenderpass.c
@@ -98,7 +98,7 @@ gsk_vulkan_render_pass_free (GskVulkanRenderPass *self)
   goto fallback; \
 }G_STMT_END
 
-void
+static void
 gsk_vulkan_render_pass_add_node (GskVulkanRenderPass           *self,
                                  GskVulkanRender               *render,
                                  const GskVulkanPushConstants  *constants,