PR modula2/111330 Bootstrap failure building SeqFile.lo

cc1gm2 issues a runtime case statement error and terminates
when building SeqFile.lo on Fedora mock.  There are four
missing labels from the largest case statement in M2SymInit.mod.
This patch adds the case labels and appropriate actions.

gcc/m2/ChangeLog:

	PR modula2/111330
	* gm2-compiler/M2SymInit.mod (CheckReadBeforeInitQuad): Add
	case labels LogicalDiffOp, DummyOp, OptParamOp and
	InitAddressOp.

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

gcc/m2/gm2-compiler/M2SymInit.mod

@@ -1318,6 +1318,7 @@ BEGIN
    LogicalOrOp,
    LogicalAndOp,
    LogicalXorOp,
+   LogicalDiffOp,
    CoerceOp,
    ConvertOp,
    CastOp,
@@ -1368,7 +1369,10 @@ BEGIN
    RestorePriorityOp,
    RangeCheckOp,
    ModuleScopeOp,
-   ErrorOp          : |
+   ErrorOp,
+   DummyOp,
+   OptParamOp,
+   InitAddressOp   : |
 
    END ;
    RETURN FALSE