Revert "Revert "	* genmodes.c (struct mode_data): Add need_bytesize_adj field.""

This reverts commit 51913168c4bc80b22cce3c8005ff671f69104222.

Signed-off-by: Chet Kener <Cl3Kener@gmail.com>

Conflicts:
	gcc/fortran/ChangeLog