Fix Smalltalk reader to always return correct line numbers.


git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/steptalk/trunk@36455 72102866-910b-0410-8b05-ffd578937521
Fix -collect: method to properly handle nil results from block.


git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/steptalk/trunk@36456 72102866-910b-0410-8b05-ffd578937521