trans.c (gnat_to_gnu): Avoid making a SAVE_EXPR for a call to a function that returns an unconstrained...

	* gcc-interface/trans.c (gnat_to_gnu): Avoid making a SAVE_EXPR for
	a call to a function that returns an unconstrained type with default
	discriminant.  Similarly, avoid doing the conversion to the nominal

From-SVN: r183610