Don't allow any type of movement starting in the top softbutton area

Clicking in the top soft button area causes the trackpad to begin
registering motion, even if the finger never leaves the top soft button
area. We don't want this kind of behavior for the top soft button area,
since it makes clicking and dragging items much more difficult when
using a pointing stick.
Signed-off-by: Stephen Chandler Paul <thatslyude@gmail.com>
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>

src/synaptics.c

@@ -3107,7 +3107,8 @@ HandleState(InputInfoPtr pInfo, struct SynapticsHwState *hw, CARD32 now,
 
     /* If a physical button is pressed on a clickpad, use cumulative relative
      * touch movements for motion */
-    if (para->clickpad && (hw->left || hw->right || hw->middle)) {
+    if (para->clickpad && (priv->lastButtons & 7) &&
+        priv->last_button_area != TOP_BUTTON_AREA) {
         hw->x = hw->cumulative_dx;
         hw->y = hw->cumulative_dy;
         using_cumulative_coords = TRUE;