for Nenuba pen,use the original pressure value from the Nenula pen driver

@@ -376,13 +376,13 @@
 			x = px * ratio_x;
 			y = py * ratio_y;
 
-			if(last_ext_press == 0 && press == 1){
+			if(last_ext_press == 0 && press != 0){
 				ctx.beginPath();
 
 				ctx.moveTo(x, y);
 				last_ext_press = 1;
 			}
-			else if(press == 1) {
+			else if(press != 0) {
 				ctx.lineTo(x, y);
 				ctx.stroke();
 			}