Begin M17 support.

Utils.h

@@ -1,5 +1,5 @@
 /*
- *   Copyright (C) 2015,2016 by Jonathan Naylor G4KLX
+ *   Copyright (C) 2015,2016,2020 by Jonathan Naylor G4KLX
  *
  *   This program is free software; you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -32,6 +32,8 @@
 
 uint8_t countBits8(uint8_t bits);
 
+uint8_t countBits16(uint16_t bits);
+
 uint8_t countBits32(uint32_t bits);
 
 uint8_t countBits64(uint64_t bits);