Ensure all known valuator values are stored when out of proximity

The current code overwrites *all* the stored axis values with whatever
came in from evdev. Evdev is a stateful protocol, so it only sends us
updates to the axis values that have changed. We need to only update
the values that have changed.

Signed-off-by: Chase Douglas <chase.douglas@canonical.com>
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>

src/evdev.c

@@ -504,7 +504,10 @@ EvdevProcessProximityState(InputInfoPtr pInfo)
     if (!pEvdev->prox_queued)
     {
         if (pEvdev->abs_queued && !pEvdev->in_proximity)
-            valuator_mask_copy(pEvdev->prox, pEvdev->vals);
+            for (i = 0; i < valuator_mask_size(pEvdev->vals); i++)
+                if (valuator_mask_isset(pEvdev->vals, i))
+                    valuator_mask_set(pEvdev->prox, i,
+                                      valuator_mask_get(pEvdev->vals, i));
         return 0;
     }