2003-06-19  Doug Gregor <dgregor@apple.com>
	* testsuite/20_util/auto_ptr.cc: don't dereference NULL auto_ptr
	* testsuite/21_strings/basic_string/replace/char/4.cc: don't 
	    dereference end iterator.
	* testsuite/21_strings/basic_string/replace/wchar_t/4.cc: same.
	* testsuite/22_locale/ctype/narrow/char/1.cc: don't subscript with
	    index equal to the length of a string.
	* testsuite/22_locale/ctype/narrow/char/2.cc: same.
	* testsuite/22_locale/ctype/narrow/wchar_t/1.cc: same.
	* testsuite/22_locale/ctype/narrow/wchar_t/2.cc: same.
	* testsuite/22_locale/ctype/widen/char/1.cc: same.
	* testsuite/22_locale/ctype/widen/wchar_t/1.cc: same.
	* testsuite/23_containers/list_modifiers.cc: don't dereference 
	    singular reverse iterator.
	* testsuite/23_containers/vector_bool.cc: don't increment singular
	    iterator.
	* testsuite/24_iterators/rel_ops.cc: don't compare singular iterator.