Patch for bfd/cache.c - explicit cast to void*

[Tom Tromey]

>>>>> "Jerker" == Jerker Bäck <jerker.back@telia.com> writes:

Jerker> Some compilers refuse to compile the current source and emmits:
Jerker> error C2036: 'void *' : unknown size 

gdb uses -Wpointer-arith when compiled with gcc; perhaps binutils
ought to do this as well.

Jerker> +      chunk_nread = cache_bread_1 (abfd, (void*)((file_ptr)buf + nread), chunk_size);

I think just (char *) buf + nread would be more typical.

Tom