* stabsread.h, dbxread.c (end_psymtab): Return NULL if the psymtab

	* stabsread.h, dbxread.c (end_psymtab):  Return NULL if the psymtab
	was empty and thrown away.
	* mipsread.c (parse_partial_symbols):  Do not add empty psymtabs to
	dependency list, skip self dependencies.
	* mipsread.c (parse_fdr):  Removed, obsolete.
	* mipsread.c (parse_lines):  Check for cbLine being zero, not
	cbLineOffset.
	* mipsread.c (struct symloc):  Add pst_language.
	* mipsread.c (parse_partial_symbols):  Set up proper language for header
	files, save it in pst_language for psymtab_to_symtab_1.
	* mipsread.c (psymtab_to_symtab_1):  Use pst_language.