Make gcc 4.1 happy with NULL in EXPECT_EQ

base/thread_local_unittest.cc

Index: base/thread_local_unittest.cc
===================================================================
--- base/thread_local_unittest.cc	(revision 1712)
+++ base/thread_local_unittest.cc	(working copy)
@@ -85,13 +85,13 @@
   done.Reset();
   tp1.AddWork(&getter);
   done.Wait();
-  EXPECT_EQ(NULL, tls_val);
+  EXPECT_EQ(static_cast<ThreadLocalTesterBase*>(NULL), tls_val);
 
   tls_val = kBogusPointer;
   done.Reset();
   tp2.AddWork(&getter);
   done.Wait();
-  EXPECT_EQ(NULL, tls_val);
+  EXPECT_EQ(static_cast<ThreadLocalTesterBase*>(NULL), tls_val);
 
 
   SetThreadLocal setter(&tlp, &done);
@@ -113,7 +113,7 @@
   done.Reset();
   tp2.AddWork(&getter);
   done.Wait();
-  EXPECT_EQ(NULL, tls_val);
+  EXPECT_EQ(static_cast<ThreadLocalTesterBase*>(NULL), tls_val);
 
   // Set thread 2 to kBogusPointer + 1.
   setter.set_value(kBogusPointer + 1);