* Makefile.in (copying.o, f-exp.tab.o, dpx2-nat.o, dstread.o,

	* Makefile.in (copying.o, f-exp.tab.o, dpx2-nat.o, dstread.o,
	i386aix-nat.o, i386m3-nat.o, irix5-nat.o, lynx-nat.o, m3-nat.o,
	mipsm3-nat.o, ns32km3-nat.o, remote-e7000.o, remote-os9k.o):
	Add dependencies.
	(copying.o, os9kread.o, remote.o):  Update dependencies.

	* valarith.c (value_sub):  When subtracting pointers, only
	check for a match of the pointed to element lengths.
	Cast element length to LONGEST to obtain a signed result for
	pointer subtractions.