2015-01-06  Bob Duff  <duff@adacore.com>

	* a-cfinve.adb (Copy): Set the discriminant to the Length when
	Capacity = 0.
	* a-cofove.ads (Capacity): Add a postcondition.
	* a-cfinve.ads (Capacity): Add a postcondition.
	(Reserve_Capacity): Correct the postcondition in the case where
	Capacity = 0; that means "Capacity => Length (Container)".
	* a-cofove.adb (Elems[c]): Add a comment
	explaining the dangers and how to avoid them.

2015-01-06  Ed Schonberg  <schonberg@adacore.com>

	* sem_ch12.adb: Code clean up.

From-SVN: r219225