Fix build for precompiled target

runtime/vm/dart.cc

Index: runtime/vm/dart.cc
diff --git a/runtime/vm/dart.cc b/runtime/vm/dart.cc
index f872fa17b3fda4b55a769741d0ae976d622c1446..07cdcdc1fd4d5662ec39a65224617601e2f64bcf 100644
--- a/runtime/vm/dart.cc
+++ b/runtime/vm/dart.cc
@@ -610,16 +610,18 @@ RawError* Dart::InitializeIsolate(const uint8_t* snapshot_data,
     I->class_table()->Print();
   }
 
+  bool is_kernel_isolate = false;
 #ifndef DART_PRECOMPILED_RUNTIME
   KernelIsolate::InitCallback(I);
+  is_kernel_isolate = KernelIsolate::IsKernelIsolate(I);
 #endif
   ServiceIsolate::MaybeMakeServiceIsolate(I);
-  if (!ServiceIsolate::IsServiceIsolate(I) &&
-      !KernelIsolate::IsKernelIsolate(I)) {
+  if (!ServiceIsolate::IsServiceIsolate(I) && !is_kernel_isolate) {
     I->message_handler()->set_should_pause_on_start(
         FLAG_pause_isolates_on_start);
     I->message_handler()->set_should_pause_on_exit(FLAG_pause_isolates_on_exit);
   }
+
   ServiceIsolate::SendIsolateStartupMessage();
   if (FLAG_support_debugger) {
     I->debugger()->NotifyIsolateCreated();