inputsystem: fix UB in touch events callback, make touch more responsive

public/cdll_int.h

@@ -790,7 +790,7 @@ public:
 
 	virtual bool IsConnectedUserInfoChangeAllowed( IConVar *pCvar ) = 0;
 
-	virtual void IN_TouchEvent( uint data, uint data2, uint data3, uint data4 ) = 0;
+	virtual void IN_TouchEvent( int type, int fingerId, int x, int y ) = 0;
 };
 
 #define CLIENT_DLL_INTERFACE_VERSION		"VClient017"

public/inputsystem/iinputsystem.h

@@ -119,6 +119,7 @@ public:
 
 	// read and clear accumulated raw input values
 	virtual bool GetRawMouseAccumulators( int& accumX, int& accumY ) = 0;
+	virtual bool GetTouchAccumulators( int fingerId, float &dx, float &dy ) = 0;
 
 	// tell the input system that we're not a game, we're console text mode.
 	// this is used for dedicated servers to not initialize joystick system.