fix test back

Author: ladyada

examples/bme280test/bme280test.ino

@@ -40,7 +40,8 @@ void setup() {
     bool status;
 
     // default settings
-    status = bme.begin(&Wire1);
+    // (you can also pass in a Wire library object like &Wire2)
+    status = bme.begin();  
     if (!status) {
         Serial.println("Could not find a valid BME280 sensor, check wiring!");
         while (1);