Merge pull request #17 from per1234/example-handle-begin-fail

Prevent execution of the rest of example program if begin fails

Author: caternuson

examples/nau7802_test/nau7802_test.ino

@@ -7,6 +7,7 @@ void setup() {
   Serial.println("NAU7802");
   if (! nau.begin()) {
     Serial.println("Failed to find NAU7802");
+    while (1) delay(10);  // Don't proceed.
   }
   Serial.println("Found NAU7802");
 
@@ -72,4 +73,4 @@ void loop() {
   }
   int32_t val = nau.read();
   Serial.print("Read "); Serial.println(val);
-}
+}