Slightly enhance diagnostic

git-svn-id: svn+ssh://svn.code.sf.net/p/firebird/code/firebird/branches/B2_5_Release@58583 65644016-39b1-43b1-bf79-96bc8fe82c15
Slightly enhanced diagnostics

git-svn-id: svn+ssh://svn.code.sf.net/p/firebird/code/firebird/branches/B2_5_Release@58584 65644016-39b1-43b1-bf79-96bc8fe82c15
Fixed CORE-4210 - Preserve comments for output parameters after altering procedures.

git-svn-id: svn+ssh://svn.code.sf.net/p/firebird/code/firebird/branches/B2_5_Release@58586 65644016-39b1-43b1-bf79-96bc8fe82c15