[patch] Fix warnings using gcc-4.5 HEAD

[Jan Kratochvil]

Hi all,

Checked-in:
	http://sourceware.org/ml/gdb-cvs/2009-09/msg00080.html

gdb/
	Fix gcc-4.5 HEAD warnings for enum ada_operator.
	* Makefile.in (HFILES_NO_SRCDIR): Add ada-operator.inc.
	* ada-lang.h (enum ada_operator): Move it to ...
	* ada-operator.inc: ... a new file.
	* expression.h (enum exp_opcode): Include ada-operator.inc.
	New element OP_UNUSED_LAST.  Update comment for OP_EXTENDED0.
	
gdb/
	Fix gcc-4.5 HEAD warnings for GDB_FORM_cached_string.
	* dwarf2read.c (GDB_FORM_cached_string)
	(dwarf_form_name <GDB_FORM_cached_string>): Remove.
	(struct attribute <dwarf_form>): Reduce the bit width.
	(struct attribute <string_is_canonical>, DW_STRING_IS_CANONICAL): New.
	(read_attribute_value <DW_FORM_string>)
	(read_attribute_value <DW_FORM_strp>): Initialize
	DW_STRING_IS_CANONICAL.
	(dwarf2_name, dump_die_shallow <DW_FORM_string>)
	(dump_die_shallow <DW_FORM_strp>): Update the code using former
	GDB_FORM_cached_string.


Thanks,
Jan