Fixed CORE-4198 - Incorrect "token unknown" error when the SQL string ends with a hex number literal.

git-svn-id: svn+ssh://svn.code.sf.net/p/firebird/code/firebird/trunk@58552 65644016-39b1-43b1-bf79-96bc8fe82c15
Simplificate representation of 64-bit numbers and sequences in the parser.

git-svn-id: svn+ssh://svn.code.sf.net/p/firebird/code/firebird/trunk@58554 65644016-39b1-43b1-bf79-96bc8fe82c15