[gtk+/wip/baedert/meson: 808/841] fallback-c89: Include config.h

[Timm Bäder <baedert src gnome org>]

commit 9123bbbc4cba268d510c89412ccfaaae82a5bad4
Author: Timm Bäder <mail baedert org>
Date:   Sun Aug 21 15:43:29 2016 +0200

    fallback-c89: Include config.h
    
    It holds all the HAVE_<func> definitions.

 gtk/fallback-c89.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/gtk/fallback-c89.c b/gtk/fallback-c89.c
index df28048..0202677 100644
--- a/gtk/fallback-c89.c
+++ b/gtk/fallback-c89.c
@@ -18,7 +18,8 @@
  */
 
 #include <math.h>
- 
+#include "config.h"
+
 /* Workaround for round() for non-GCC/non-C99 compilers */
 #ifndef HAVE_ROUND
 static inline double