ModulinoDistance: fix examples for new API

Author: facchinm

examples/Modulino_Distance/Basic/Basic.ino

@@ -9,7 +9,9 @@ void setup() {
 }
 
 void loop() {
-  int measure = distance.get();
-  Serial.println(measure);
+  if (distance.available()) {
+    int measure = distance.get();
+    Serial.println(measure);
+  }
   delay(10);
 }

examples/Utilities/Modulino_PlugNPlay/Modulino_PlugNPlay.ino

@@ -40,7 +40,7 @@ void loop() {
     skip = (skip + 1) % 5;
   }
 
-  pitch = encoder.get() + distance.get();
+  pitch = encoder.get() + (distance.available() ? distance.get() : 0);
 
   if (Serial.available() && Serial.read() == 's') {
     imu.update();