Fix implicit null checks for InvokeVirtual.

Fix braino from
    https://android-review.googlesource.com/1570261 .

Test: m test-art-host-gtest
Test: testrunner.py --host --optimizing
Bug: 172573708
Bug: 180527726
Change-Id: I430d3e7034a3f600674763986a324d80903aaf6c
diff --git a/compiler/optimizing/nodes.cc b/compiler/optimizing/nodes.cc
index 4bb7ffc..215fa3e 100644
--- a/compiler/optimizing/nodes.cc
+++ b/compiler/optimizing/nodes.cc
@@ -3204,6 +3204,8 @@
     return false;
   }
   switch (GetIntrinsic()) {
+    case Intrinsics::kNone:
+      return true;
     case Intrinsics::kReferenceRefersTo:
       return true;
     default: