Windows: VirtualFree with MEM_RELEASE wants 0 instead of the region's size.

runtime/bin/file_win.cc

Index: runtime/bin/file_win.cc
diff --git a/runtime/bin/file_win.cc b/runtime/bin/file_win.cc
index bdd7065167ecad362023a843031dc02b7c5f5092..989adfdc8148c199ab73e23a1ac2df9b83514ec6 100644
--- a/runtime/bin/file_win.cc
+++ b/runtime/bin/file_win.cc
@@ -116,7 +116,7 @@ MappedMemory* File::Map(File::MapType type, int64_t position, int64_t length) {
 
 
 void MappedMemory::Unmap() {
-  bool result = VirtualFree(address_, size_, MEM_RELEASE);
+  BOOL result = VirtualFree(address_, 0, MEM_RELEASE);
   ASSERT(result);
   address_ = 0;
   size_ = 0;