Set contact count to max number of fingers (#191)

If a finger is lifted (or tapped in quick succession), the current finger is not guaranteed to be in the first slot

VoodooRMI/Functions/Input/RMITrackpadFunction.cpp

@@ -280,7 +280,7 @@ void RMITrackpadFunction::handleReport(RMI2DSensorReport *report)
     }
 
     inputEvent.transducers[0].isPhysicalButtonDown = clickpadState;
-    inputEvent.contact_count = validFingerCount;
+    inputEvent.contact_count = maxIdx;
     inputEvent.timestamp = report->timestamp;
 
     sendVoodooInputPacket(kIOMessageVoodooInputMessage, &inputEvent);