Fix various warnings seen when using gcc-5.0

[Alan Modra]

On Mon, Sep 22, 2014 at 11:41:34AM +0200, Jan-Benedict Glaw wrote:
> On Mon, 2014-09-22 19:00:31 +0930, Alan Modra <amodra@gmail.com> wrote:
> > 	* config/tc-m68k.c (md_assemble): Add assert to work around
> > 	bogus trunk gcc warning.
> 
> Thanks for plugging that!  What shall we do with
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63197 ?  That warning
> isn't fixed in GCC, but it's probably no longer a problem. Just close
> it? Or add a comment that an older Binutils version needs to be
> compiled to show the behavior?

I'd say add a comment that the gas_assert needs to be removed to see
the false warning.

-- 
Alan Modra
Australia Development Lab, IBM