Correct type definition of HANDLE.

Author: vharavy

src/test/run-pass/x86stdcall2.rs

@@ -10,7 +10,7 @@
 
 #![feature(std_misc)]
 
-pub type HANDLE = u32;
+pub type HANDLE = usize;
 pub type DWORD = u32;
 pub type SIZE_T = u32;
 pub type LPVOID = usize;