Delete m_disableSeqIfp

Signed-off-by: Ryszard Rozak <rrozak@antmicro.com>

Author: RRozak

src/V3AssertPre.cpp

@@ -690,6 +690,8 @@ class AssertPreVisitor final : public VNVisitor {
             m_disableSeqIfp
                 = new AstIf{flp, new AstEq{flp, new AstVarRef{flp, initialCntp, VAccess::READ},
                                            readCntRefp->cloneTree(false)}};
+            // Delete it, because it is always copied before insetion to the AST
+            pushDeletep(m_disableSeqIfp);
         }
         iterateChildren(nodep);
     }