Call correct FATAL macro in EventHandler.

runtime/bin/eventhandler_win.cc

Index: runtime/bin/eventhandler_win.cc
diff --git a/runtime/bin/eventhandler_win.cc b/runtime/bin/eventhandler_win.cc
index b6d40992df2f4b35b41cc05a3e290c3d6a0eca22..51e98ac47ca60fdb306b8a6b93ad96033cbf8318 100644
--- a/runtime/bin/eventhandler_win.cc
+++ b/runtime/bin/eventhandler_win.cc
@@ -272,7 +272,7 @@ bool Handle::IssueRead() {
     int result = dart::Thread::Start(ReadFileThread,
                                      reinterpret_cast<uword>(this));
     if (result != 0) {
-      FATAL("Failed to start read file thread %d", result);
+      FATAL1("Failed to start read file thread %d", result);
     }
     return true;
   }
@@ -628,7 +628,7 @@ int StdHandle::Write(const void* buffer, int num_bytes) {
     int result = dart::Thread::Start(WriteFileThread,
                                      reinterpret_cast<uword>(this));
     if (result != 0) {
-      FATAL("Failed to start write file thread %d", result);
+      FATAL1("Failed to start write file thread %d", result);
     }
     while (!write_thread_running_) {
       // Wait until we the thread is running.