[stream] Add quad-word support and stream_resize

[stream] Add quad-word support and stream_resize

2006-01-10 Paul Jakma <paul.jakma@sun.com>

	* stream.c: (stream_new) Allocate stream data as seperate object.
	  (stream_free) free the data.
	  (stream_resize) new function, resize stream to new size.
	  (stream_{get,put}q*) new functions to get/put quad word size
	  types.
	* stream.h: (struct stream) make data seperate from the stream.
	  Export new stream_resize and quad-word get/put functions.