x11: Prevent leak on XIQueryDevice
x11: Prevent leak on XIQueryDevice

Per http://linux.die.net/man/3/xiquerydevice:

> XIFreeDeviceInfo frees the information returned by
> XIQueryDevice.

ecoal95/glutin,ozkriff/glutin,tomaka/glutin,mbrubeck/glutin,bvssvni/glutin,vberger/glutin,notriddle/glutin,nc4rrillo/glutin,mbrubeck/glutin,mmatyas/glutin,tomaka/winit,mitchmindtree/glutin,servo/glutin