Bionic: Libc: Resolv: Stricter function signatures, unitialized return bug fix.

	Stricter input parameters help avoid ugly casting when passing
	pointers to immutable protobuf data.
	While at it: an int return was dropped from 2 functions whose users
	never used the result; one of the return paths was returning an
	uninitialized value.
	Size_t for portablity and warning supression, misc warnings addressed.

Change-Id: I2d5cbdaf0c9b6c4621a7d397772da13da5dc0943
3 files changed