Plug memory leaks (#5016)

src/V3Broken.cpp

@@ -372,7 +372,11 @@ void V3Broken::selfTest() {
     // Exercise addNewed and deleted for coverage, as otherwise only used with VL_LEAK_CHECKS
     FileLine* const fl = new FileLine{FileLine::commandLineFilename()};
     const AstNode* const newp = new AstBegin{fl, "[EditWrapper]", nullptr};
+    // 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
     addNewed(newp);
     deleted(newp);
+#endif
     VL_DO_DANGLING(delete newp, newp);
 }