[turbofan] Fix effect chain for polymorphic array access.

src/compiler/js-native-context-specialization.cc

Index: src/compiler/js-native-context-specialization.cc
diff --git a/src/compiler/js-native-context-specialization.cc b/src/compiler/js-native-context-specialization.cc
index 2b67bf4fcdfae6107aed2c889364eca211bea9d6..1b0258f8b066f0353e0653460240bd26aafe3deb 100644
--- a/src/compiler/js-native-context-specialization.cc
+++ b/src/compiler/js-native-context-specialization.cc
@@ -604,7 +604,7 @@ Reduction JSNativeContextSpecialization::ReduceElementAccess(
                                               fallthrough_control);
               this_controls.push_back(
                   graph()->NewNode(common()->IfTrue(), branch));
-              this_effects.push_back(effect);
+              this_effects.push_back(this_effect);
               fallthrough_control =
                   graph()->NewNode(common()->IfFalse(), branch);
             }