From fb8eacfb0256a211ca79366945c8f4eb4962be4e Mon Sep 17 00:00:00 2001
From: Emmanuele Bassi <ebassi@gnome.org>
Date: Tue, 3 Sep 2013 11:51:19 +0100
Subject: [PATCH] device: Guard against divisions by zero

The range of a device could be 0, so we need to bail out from the
scaling during the axis translation.

https://bugzilla.gnome.org/show_bug.cgi?id=707033
---
 clutter/clutter-input-device.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/clutter/clutter-input-device.c b/clutter/clutter-input-device.c
index 38f7fd737..07951e33f 100644
--- a/clutter/clutter-input-device.c
+++ b/clutter/clutter-input-device.c
@@ -46,6 +46,8 @@
 #include "clutter-private.h"
 #include "clutter-stage-private.h"
 
+#include <math.h>
+
 enum
 {
   PROP_0,
@@ -1218,6 +1220,9 @@ _clutter_input_device_translate_axis (ClutterInputDevice *device,
       info->axis == CLUTTER_INPUT_AXIS_Y)
     return FALSE;
 
+  if (fabs (info->max_value - info->min_value) < 0.0000001)
+    return FALSE;
+
   width = info->max_value - info->min_value;
   real_value = (info->max_axis * (value - info->min_value)
              + info->min_axis * (info->max_value - value))