1003 - Empty string not allowed in Function header.

Description
A Function header was provided an empty string as an argument, when an empty string is not supported.
Example
Example:
Alias( '' ) // Alias argument requires a non-empty string { }
Output:
c:\Test\fbuild.bff(1):(8) FASTBuild Error #1003 - Alias() - Empty string not allowed in Function header. Alias( '' ) ^ \--here
Fix:
Alias( 'MyAlias' ) { }