Revert "silence some -Wuninitialized false positives"

Revert "silence some -Wuninitialized false positives"

In recent versions of gcc (4.9.0), we get a few of these:

  notes.c: In function ‘notes_display_config’:
  notes.c:970:28: warning: right-hand operand of comma expression has no effect [-Wunused-value]
      config_error_nonbool(k);
                            ^
Previous commit explains the reason.

This reverts commit a469a1019352b8efc4bd7003b0bd59eb60fc428c.

Signed-off-by: Felipe Contreras <felipe.contreras@gmail.com>
Conflicts:
	cache.h
	parse-options.h