Internals: Keep a ptr to _eval in AstNetlist, make it easier to find.

Signed-off-by: Wilson Snyder <[email protected]>

src/V3Clock.cpp

@@ -394,6 +394,9 @@ public:
 	m_scopep = NULL;
 	//
 	nodep->accept(*this);
+        // Allow downstream modules to find _eval()
+        // easily without iterating through the tree.
+        nodep->evalp(m_evalFuncp);
     }
     virtual ~ClockVisitor() {}
 };