Correctly report zero fingers

This bug has been around since before alpha1, and yet the topic
of commit c7ed4c, prior to alpha1, was about precisely this; With
the bug, the last tracking id will sometimes be continued with a
new touch, resulting in a cursor jump.

This patch correctly sets zero fingers in HWData after receiving
a zero-finger event.

Signed-off-by: Henrik Rydberg <rydberg@euromail.se>

1 files changed, 2 insertions, 1 deletions

diff --git a/src/hwdata.c b/src/hwdata.c
index d696e07..9ec6241 100644
--- a/src/hwdata.c
+++ b/src/hwdata.c
@@ -40,7 +40,7 @@ static void accept_finger(struct HWData *hw)
             GETBIT(hw->mread[hw->nread], BIT_MT_POSITION_X) &&
             GETBIT(hw->mread[hw->nread], BIT_MT_POSITION_Y)) {
                 hw->mask[hw->nread] = hw->mread[hw->nread];
-                hw->nfinger = ++hw->nread;
+                hw->nread++;
         }
         if (hw->nread < DIM_FINGER)
                 hw->mread[hw->nread] = 0;
@@ -49,6 +49,7 @@ static void accept_finger(struct HWData *hw)
 static void accept_packet(struct HWData *hw, const struct timeval* tv)
 {
         static const mstime_t ms = 1000;
+        hw->nfinger = hw->nread;
         hw->nread = 0;
         hw->mread[hw->nread] = 0;
         hw->evtime = tv->tv_usec / ms + tv->tv_sec * ms;