Merge pull request #475 from geoffw0/av_164

CPP: Fix AV Rule 164

cpp/ql/src/jsf/4.21 Operators/AV Rule 164.ql

@@ -35,7 +35,7 @@ predicate constantValue(Expr e, int value) {
 predicate violation(BinaryBitwiseOperation op, int lhsBytes, int value) {
     (op instanceof LShiftExpr or op instanceof RShiftExpr) and
     constantValue(op.getRightOperand(), value) and
-    lhsBytes = op.getLeftOperand().getType().getSize() and
+    lhsBytes = op.getLeftOperand().getExplicitlyConverted().getType().getSize() and
     (value < 0 or value >= lhsBytes * 8)
 }