Fix comments, formatting

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@43726 4005530d-fff6-0310-9dd1-cebe43e6787f
IDE: In compiler options -> Other -> Defines, catch an exception when parsing an invalid option.

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@43727 4005530d-fff6-0310-9dd1-cebe43e6787f