Don't call XInput2 multitouch APIs if they aren't supported.
authorRyan C. Gordon
Mon, 17 Sep 2012 19:25:42 -0400
changeset 64338bbb5ff8788f
parent 6432 de49d33b829e
child 6434 334e7dc89adb
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
     1.1 --- a/src/video/x11/SDL_x11xinput2.c	Mon Sep 17 19:20:47 2012 -0400
     1.2 +++ b/src/video/x11/SDL_x11xinput2.c	Mon Sep 17 19:25:42 2012 -0400
     1.3 @@ -220,6 +220,10 @@
     1.4  void 
     1.5  X11_Xinput2SelectTouch(_THIS, SDL_Window *window) {
     1.6  #if SDL_VIDEO_DRIVER_X11_XINPUT2_SUPPORTS_MULTITOUCH
     1.7 +    if (!X11_Xinput2IsMultitouchSupported()) {
     1.8 +        return;
     1.9 +    }
    1.10 +
    1.11      SDL_VideoData *data = (SDL_VideoData *) _this->driverdata;
    1.12      XIEventMask eventmask;
    1.13      unsigned char mask[3] = { 0,0,0 };