Obscure error message for missing '.' before compiler directive

[DarrenStahl]

Repro:
Assemble the following line: Message: DB 'Hello World!$'
Result:
ERROR: lasm-parser (35) syntax error, unexpected TEXT, expecting DIRECTIVE

Expected result:
An error message which indicates that a compiler directive was encountered when not expected (or is missing a '.')

[hasithvm]

This should be fixable to an extent by providing bison with a better textual description of the syntax -- but I'm limited to that. Bison (the parser generator) has its own errgen mechanisms.