* elf-x86-x86.c (elf_x86_x86_write_reloc): Don't cast symbol index to

* elf-x86-x86.c (elf_x86_x86_write_reloc): Don't cast symbol index to
unsigned char.  This was causing relocation corruption after 255 symbols,
in ELF32 only.
* elfmanysym.asm: Additional test that has exactly 257 symbols.

We actually should have caught this with the very large 32-bit elf-x86id.asm
test, but that object file (unlike the 64-bit GAS version of it) has only
been manually reviewed.  This bug was only in ELF32, and wasn't in ELF64.

Fixes bug #62 submitted by: Jens von der Heydt <mailme@vdh-webservice.de>

svn path=/trunk/yasm/; revision=1330