1021 - Unexpected Function header.

Description
An attempt to invoke a Function with a header was made, where the Function does not accept a header.
Example
Config:
Settings( 'bad' ) { }
Output:
c:\Test\fbuild.bff(1):(9) FASTBuild Error #1021 - Settings() - Unexpected Function header. Settings( 'bad' ) ^ \--here
Fix:
Settings { }