Compile errors when using Particle Build

[kaliatech]

There are two code issues in this library source that result in compilation errors if copy/pasted in to the Particle Build cloud IDE. I am not familiar enough with the Particle ecosystem and history to understand if/how this worked previously.

Compile errors:

src/SparkFunRHT03.cpp:119:28: error: 'CHECKSUM' was not declared in this scope
     if (checksum(dataBytes[CHECKSUM], dataBytes, 4))
                            ^
src/SparkFunRHT03.cpp:121:48: error: 'HUMIDITY_H' was not declared in this scope
   _humidity = (static_cast<uint16_t>(dataBytes[HUMIDITY_H] << 8) | dataBytes[HUMIDITY_L]);
                                                ^
src/SparkFunRHT03.cpp:121:78: error: 'HUMIDITY_L' was not declared in this scope
   _humidity = (static_cast<uint16_t>(dataBytes[HUMIDITY_H] << 8) | dataBytes[HUMIDITY_L]);
                                                                              ^
src/SparkFunRHT03.cpp:122:52: error: 'TEMP_H' was not declared in this scope
   _temperature = static_cast<uint16_t> ((dataBytes[TEMP_H] << 8) | dataBytes[TEMP_L]);
                                                    ^
src/SparkFunRHT03.cpp:122:78: error: 'TEMP_L' was not declared in this scope
   _temperature = static_cast<uint16_t> ((dataBytes[TEMP_H] << 8) | dataBytes[TEMP_L]);
                                                                              ^
src/SparkFunRHT03.cpp:131:6: error:
prototype for 'bool RHT03::checksum(byte, const byte*, unsigned int)' 
does not match any in class 'RHT03'
 bool RHT03::checksum(const byte check, const byte * data, const unsigned int datalen)
      
src/SparkFunRHT03.cpp:35:7: error: candidate is: bool RHT03::checksum(byte, byte*, unsigned int)
  bool checksum(byte check, byte * data, const unsigned int datalen);