PR modula2/120497: error is generated for good code when returning a pointer var...

PR modula2/120497: error is generated for good code when returning a pointer var variable

The return type checking needs to skip over the Lvalue part of the VAR
parameter or variable.

gcc/m2/ChangeLog:

	PR modula2/120497
	* gm2-compiler/M2Range.mod (IsAssignmentCompatible): Remove from
	import list.
	(FoldTypeReturnFunc): Rewrite to skip the Lvalue of a var
	variable.
	(CodeTypeReturnFunc): Ditto.
	(CodeTypeIndrX): Call AssignmentTypeCompatible rather than
	IsAssignmentCompatible.
	(FoldTypeIndrX): Ditto.

gcc/testsuite/ChangeLog:

	PR modula2/120497
	* gm2/pim/pass/ReturnType.mod: New test.
	* gm2/pim/pass/ReturnType2.mod: New test.

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