Fix for Mantis #23700 .

scanner.pas, parse_compiler_expr.read_factor:
  * initialize result value


git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@23454 3ad0048d-3df7-0310-abae-a5850022a9f2
* Notification should be protected

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@23455 3ad0048d-3df7-0310-abae-a5850022a9f2