diffs for locale_facet files

[Benjamin Kosnik]

Thanks Russell! This patch was a lot easier to deal with. It's now in.
Your original testcase for this problem has been integrated into
27_io/istream_extractors_arith.cc, and this now passes.

-benjamin

1999-08-12  Benjamin Kosnik  <bkoz@tintin.cygnus.com>
	    Russell Davidson <russell@ehess.cnrs-mrs.fr> 

	* bits/locale_facets.tcc (_M_extract): Finish off patch from 
        yesterday.
	* src/Makefile.am (myinstallheaders): Tweak, remove PHONY.