* include/tr1_impl/regex (basic_regex::basic_regex): Use range
	constructor for _M_pattern.
	* testsuite/tr1/7_regular_expressions/basic_regex/ctors/char/
	string.cc: Test construction from different basic_string type.
	* testsuite/tr1/7_regular_expressions/basic_regex/ctors/wchar_t/
	string.cc: Likewise.

From-SVN: r143275