Remove some gcc warning

make.tmpl contains some commented-out CFLAGS. They are sometimes useful to check the code, e.g. signed/unsigned corresness, so I'm trying to uncomment them before posting a patch.

Attached patch removes some of making-sense warnings that appear when such additional CFLAGS are turned on. (Most of them are attributing 'unused')

Thanks,

Jun'ichi Nomura, NEC Corporation of America
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