Fix common and 0-offset local definition of symbol. The symbol would end

Fix common and 0-offset local definition of symbol.  The symbol would end
up with the alignment as the offset rather than 0.  The cause of this was
that elf_sym_set_nonzero was getting a 0 offset which it then did not set.

* elf.c (elf_symtab_set_nonzero): Make value a pointer so that 0 values
can actually get set if necessary.
* elf.h (elf_symtab_set_nonzero): Update prototype.
* elf-objfmt.c (elf_objfmt_symtab_append): Likewise, and ripple changes.

* elf_gas64_reloc.hex: Update (now is correct).

svn path=/trunk/yasm/; revision=1313