warnings fixes with --enable-debug

[Keith Packard]

Eric Anholt <eric at anholt.net> writes:

> Here's a series for fixing almost all the warnings I get with
> --enable-debug.  I had been building X without --enable-debug (and
> thus without asserts) because mesa forces -O0 with --enable-debug, so
> my normal config script wasn't using the flag.
>
> Remaining warnings include the dead bswap64 in glx (need to fix mesa's
> scripts), and a non-string-literal-to-sprintf warning in x86emu.
>
> Note that in a couple of debug printfs I replaced %x with %p, which
> means that the output will actually change.  I find %p output to be
> much more readable, anyway.

There are a couple of review comments on this series, which otherwise
looks like it's ready for merging.

-- 
keith.packard at intel.com
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