* configure.in: Explicitly `exit 0' for broken shells.

	* configure.in:  Explicitly `exit 0' for broken shells.
	* configure:  Rebuilt.

	* symtab.c (list_symbols):  Add missing blank after
	`<function, no debug info>' output.

	* valops.c (value_assign):  Handle truncation when assigning
	to bitfields. Use value_copy to construct the return value
	from toval.
	* values.c (value_copy):  Copy VALUE_FRAME and VALUE_OPTIMIZED_OUT.