From 3e5c11cce6209cd1e218927651e3247062de9e83 Mon Sep 17 00:00:00 2001
From: "Ryan C. Gordon" <icculus@icculus.org>
Date: Mon, 17 Sep 2012 19:25:42 -0400
Subject: [PATCH] Don't call XInput2 multitouch APIs if they aren't supported.

I think it fixes this:
   http://forums.libsdl.org/viewtopic.php?t=8324&sid=ae797309f9e2084cadc1b6a7615bd0e4
---
 src/video/x11/SDL_x11xinput2.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/video/x11/SDL_x11xinput2.c b/src/video/x11/SDL_x11xinput2.c
index c654c7fa1..94f7599a5 100644
--- a/src/video/x11/SDL_x11xinput2.c
+++ b/src/video/x11/SDL_x11xinput2.c
@@ -220,6 +220,10 @@ X11_InitXinput2Multitouch(_THIS) {
 void 
 X11_Xinput2SelectTouch(_THIS, SDL_Window *window) {
 #if SDL_VIDEO_DRIVER_X11_XINPUT2_SUPPORTS_MULTITOUCH
+    if (!X11_Xinput2IsMultitouchSupported()) {
+        return;
+    }
+
     SDL_VideoData *data = (SDL_VideoData *) _this->driverdata;
     XIEventMask eventmask;
     unsigned char mask[3] = { 0,0,0 };