libobjc: Tidyup of comments and indentation

[Nicola Pero]

This patch just tidies up comments and indentation of a number of files in libobjc;
no actual code changes.

Committed to trunk.

Thanks

In libobjc/:
2010-12-18  Nicola Pero  <nicola.pero@meta-innovation.com>

        * class.c: Tidied up comments and indentation.  No code changes.
        * error.c: Same.
        * exception.c: Same.
        * init.c: Same.
        * ivars.c: Same.
        * memory.c: Same.
        * objc-foreach.c: Same.
        * objc-sync.c: Same.
        * objects.c: Same.
        * protocols.c: Same.
        * sarray.c: Same.
        * thr.c: Same.
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