Switching the tests to use size_t instead of unsigned int to hopefully appease the Linux x64 build bot (take 2, forgot this test case).

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@182907 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/SemaCXX/microsoft-new-delete.cpp b/test/SemaCXX/microsoft-new-delete.cpp
index 90b42ed..e0d25dc 100644
--- a/test/SemaCXX/microsoft-new-delete.cpp
+++ b/test/SemaCXX/microsoft-new-delete.cpp
@@ -1,8 +1,10 @@
 // RUN: %clang_cc1 -fms-compatibility -fsyntax-only -verify %s
 // expected-no-diagnostics
 
+#include <stddef.h>
+
 struct arbitrary_t {} arbitrary;
-void *operator new(unsigned int size, arbitrary_t);
+void *operator new(size_t size, arbitrary_t);
 
 void f() {
   // Expect no error in MSVC compatibility mode