ValEdit: do not store '=' in Strings is "key" and "value" cell is empty.


git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@40297 4005530d-fff6-0310-9dd1-cebe43e6787f
ValEdit: Ignore epmty cells when validating.


git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@40298 4005530d-fff6-0310-9dd1-cebe43e6787f