[turbofan] Fix bad merge.

TBR=bmeurer@chromium.org

Review-Url: https://codereview.chromium.org/2057063002
Cr-Commit-Position: refs/heads/master@{#36886}

src/compiler/effect-control-linearizer.cc

@@ -454,6 +454,7 @@ bool EffectControlLinearizer::TryWireInStateEffect(Node* node,
       break;
     case IrOpcode::kCheckIf:
       state = LowerCheckIf(node, frame_state, *effect, *control);
+      break;
     case IrOpcode::kPlainPrimitiveToNumber:
       state = LowerPlainPrimitiveToNumber(node, *effect, *control);
       break;