Input: fix potential overflows in driver/input/joystick

Change all sprintfs into snprintfs to make sure we won't stomp on
data adjacent to our buffers.

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
diff --git a/drivers/input/joystick/spaceorb.c b/drivers/input/joystick/spaceorb.c
index 7c123a0..3e2782e 100644
--- a/drivers/input/joystick/spaceorb.c
+++ b/drivers/input/joystick/spaceorb.c
@@ -177,7 +177,7 @@
 		goto fail;
 
 	spaceorb->dev = input_dev;
-	sprintf(spaceorb->phys, "%s/input0", serio->phys);
+	snprintf(spaceorb->phys, sizeof(spaceorb->phys), "%s/input0", serio->phys);
 
 	input_dev->name = "SpaceTec SpaceOrb 360 / Avenger";
 	input_dev->phys = spaceorb->phys;