[gtk+] gsk: Include config.h

[Benjamin Otte <otte src gnome org>]

commit 08f9a6078bf9a4a748ef8ad6a039e97f33937b9a
Author: Benjamin Otte <otte redhat com>
Date:   Fri Dec 23 02:05:54 2016 +0100

    gsk: Include config.h
    
    The more you know:
    Not including config.h causes the public API implemented in this file to
    not be exported in the resulting library.

 gsk/gskrendernodeimpl.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/gsk/gskrendernodeimpl.c b/gsk/gskrendernodeimpl.c
index d2f2724..bc589d0 100644
--- a/gsk/gskrendernodeimpl.c
+++ b/gsk/gskrendernodeimpl.c
@@ -16,6 +16,8 @@
  * License along with this library. If not, see <http://www.gnu.org/licenses/>.
  */
 
+#include "config.h"
+
 #include "gskrendernodeprivate.h"
 
 #include "gskcairoblurprivate.h"