#1 BriefC: Variable declaration mess

[Guillermo Martínez Jiménez]

When found an undeclared variable it doesn't behaves as it should:

• If it is an assignation it returns Error: "; (semicolon)" expected but "identifier variable" found. but should write Error: "Unknown identifier "variable" or similar.
• In other cases it just ignores but doesn't emit any code, so it generate a runtime error (not always though: it depends of the state of the stack .

[Guillermo Martínez Jiménez]

Fixed in SVN#87