gdb/

gdb/
	Code cleanup.
	* symtab.c (search_symbols): Reorder the KIND description in the
	function comment.  Remove the unused 4th element of types, types2,
	types3 and types4.  New gdb_assert on KIND.
	(symtab_symbol_info): Remove the unused 4th element of classnames.
	New gdb_assert on KIND.
	* symtab.h (enum search_domain): New warning in the enum comment.
	Assign numbers to the elements VARIABLES_DOMAIN, FUNCTIONS_DOMAIN and
	TYPES_DOMAIN.