Input: fix sparse warning in multitouch code

This fixes the following sparse warning:
drivers/input/input-mt.c:193:18: warning: Using plain integer as NULL pointer

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/input/input-mt.c b/drivers/input/input-mt.c
index c0ec7d42c3be..bf2f30c02589 100644
--- a/drivers/input/input-mt.c
+++ b/drivers/input/input-mt.c
@@ -190,7 +190,7 @@ void input_mt_report_pointer_emulation(struct input_dev *dev, bool use_count)
         if (!mt)
                 return;
 
-        oldest = 0;
+        oldest = NULL;
         oldid = mt->trkid;
         count = 0;