CFE_ES_CalculateCRC Header has incorrect return description

[zanzaben]

Describe the bug
The return in the header of CFE_ES_CalculateCRC says it returns error codes but it doesn't. When things go wrong it returns either the input crc or 0 depending on how it went wrong,

Expected behavior
Header should correctly explain what CFE_ES_CalculateCRC can return.

Additional context
If TypeCRC is a non-implemented type then it returns 0.
If DataPtr is null or DataLength is zero it returns the input crc

Reporter Info
Alex Campbell GSFC