PR modula2/120606: FOR loop ICE if the last expression uses an array

PR modula2/120606: FOR loop ICE if the last expression uses an array

This patch fixes the ICE which occurs if the last expression is an array.
It ensures that the start and end values of the for loop expressions are
dereferenced.

gcc/m2/ChangeLog:

	PR modula2/120606
	* gm2-compiler/M2Quads.mod (ForLoopLastIterator): Dereference
	start and end expressions e1 and e2 respectively.

gcc/testsuite/ChangeLog:

	PR modula2/120606
	* gm2/pim/pass/forarray.mod: New test.

Signed-off-by: Gaius Mulley <gaiusmod2@gmail.com>