add default arguments

Author: brentru

src/AdafruitIO_WiFi.h

@@ -45,7 +45,7 @@ typedef AdafruitIO_WICED AdafruitIO_WiFi;
 
 #else
 
-#error "Must define USE_AIRLIFT or USE_WINC1500 before including this file."
+#warning "Must define USE_AIRLIFT or USE_WINC1500 before including this file."
 
 #endif
 

src/wifi/AdafruitIO_AIRLIFT.h

@@ -60,8 +60,8 @@ class AdafruitIO_AIRLIFT : public AdafruitIO {
   */
   /**************************************************************************/
   AdafruitIO_AIRLIFT(const char *user, const char *key, const char *ssid,
-                     const char *pass, int ssPin, int ackPin, int rstPin,
-                     int gpio0Pin, SPIClass *wifi)
+                     const char *pass, int ssPin=10, int ackPin=9, int rstPin=6,
+                     int gpio0Pin=-1, SPIClass *wifi)
       : AdafruitIO(user, key) {
     _wifi = wifi;
     _ssPin = ssPin;