PR libgfortran/24685

	* io/write.c (MIN_FIELD_WIDTH, STR, STR1): Define.
	(output_float): Increase buffer sizes for IEEE quad and IBM extended
	long double.
	(write_real): Output REAL(16) as 1PG43.34E4 rather than 1PG40.31E4.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@112819 138bc75d-0d04-0410-961f-82ee72b054a4