From 6cf729765392c94b02aeb0879a8fb0286934ef4d Mon Sep 17 00:00:00 2001
From: Chun-wei Fan <fanchunwei@src.gnome.org>
Date: Tue, 28 Aug 2018 17:28:23 +0800
Subject: [PATCH] gtk/gtkeventcontrollerscroll.c: Include fallback-c89.c

... instead of just math.h, as it uses the C99 function trunc().  This
is so that the code builds on pre-C99 compilers.
---
 gtk/gtkeventcontrollerscroll.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/gtk/gtkeventcontrollerscroll.c b/gtk/gtkeventcontrollerscroll.c
index 73848cd6e5..314be1b708 100644
--- a/gtk/gtkeventcontrollerscroll.c
+++ b/gtk/gtkeventcontrollerscroll.c
@@ -60,8 +60,6 @@
  **/
 #include "config.h"
 
-#include "math.h"
-
 #include "gtkintl.h"
 #include "gtkwidget.h"
 #include "gtkeventcontrollerprivate.h"
@@ -70,6 +68,8 @@
 #include "gtkmarshalers.h"
 #include "gtkprivate.h"
 
+#include "fallback-c89.c"
+
 #define SCROLL_CAPTURE_THRESHOLD_MS 150
 
 typedef struct