[gtk+] gtkstylecontext.c: Include fallback-c89.c

[Chun-wei Fan <fanchunwei src gnome org>]

commit eacfad7ed693c180158a5eee82335082a87973ea
Author: Chun-wei Fan <fanchunwei src gnome org>
Date:   Mon Feb 2 15:00:45 2015 +0800

    gtkstylecontext.c: Include fallback-c89.c
    
    round() is now being used in the function, so that compilers without
    round() in their math.h is supported.

 gtk/gtkstylecontext.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtkstylecontext.c b/gtk/gtkstylecontext.c
index c3e70f7..d717abf 100644
--- a/gtk/gtkstylecontext.c
+++ b/gtk/gtkstylecontext.c
@@ -53,6 +53,8 @@
 #include "deprecated/gtkgradientprivate.h"
 #include "deprecated/gtksymboliccolorprivate.h"
 
+#include "fallback-c89.c"
+
 /**
  * SECTION:gtkstylecontext
  * @Short_description: Rendering UI elements