modula2: gcc/m2/gm2-libs/M2Dependent.mod initialize all record fields.

Initialize all sub fields within mptr.  Valgrind detected
uninitialized fields in M2Dependent.mod.  CreateModule must ensure all
sub fields are initialized.

gcc/m2/ChangeLog:

	* gm2-libs/M2Dependent.mod (CreateModule): Initialize all
	dependency fields for DependencyList.

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