Fixed build on linux64 - it was really bad that behavior of macro FB_ALIGN depended upon alignment parameter type

git-svn-id: svn+ssh://svn.code.sf.net/p/firebird/code/firebird/trunk@59899 65644016-39b1-43b1-bf79-96bc8fe82c15
Tweaks to CORE-4488.

git-svn-id: svn+ssh://svn.code.sf.net/p/firebird/code/firebird/trunk@59900 65644016-39b1-43b1-bf79-96bc8fe82c15