Merge pull request #14 from jerryneedell/jerryn_fix_header

 fix error when no header requested

Author: siddacious

adafruit_rfm69.py

@@ -779,11 +779,11 @@ def receive(self, timeout=0.5, keep_listening=True, with_header=False,
             else:
                 packet = bytearray(fifo_length)
                 device.readinto(packet)
-            if (rx_filter != _RH_BROADCAST_ADDRESS and packet[0] != _RH_BROADCAST_ADDRESS
-                    and packet[0] != rx_filter):
-                packet = None
-            if not with_header:  # skip the header if not wanted
-                packet = packet[4:]
+                if (rx_filter != _RH_BROADCAST_ADDRESS and packet[0] != _RH_BROADCAST_ADDRESS
+                        and packet[0] != rx_filter):
+                    packet = None
+                elif not with_header:  # skip the header if not wanted
+                    packet = packet[4:]
 
         # Listen again if necessary and return the result packet.
         if keep_listening: