Internals: Make all AstBegin constructor arguments explicit (#6464)

src/V3Broken.cpp

@@ -382,7 +382,7 @@ void V3Broken::allowMidvisitorCheck(bool flag) { s_brokenAllowMidvisitorCheck =
 void V3Broken::selfTest() {
     // Exercise addNewed and deleted for coverage, as otherwise only used with VL_LEAK_CHECKS
     FileLine* const fl = new FileLine{FileLine::commandLineFilename()};
-    AstNode* const newp = new AstBegin{fl, "[EditWrapper]", nullptr};
+    AstNode* const newp = new AstBegin{fl, "[EditWrapper]", nullptr, false, false};
     // Don't actually do it with VL_LEAK_CHECKS, when new/delete calls these.
     // Otherwise you call addNewed twice on the same address, which is an error.
 #ifndef VL_LEAK_CHECKS