Switching to real page sizes, not allocation granularity.

src/xenia/base/memory_win.cc

@@ -15,6 +15,16 @@ namespace xe {
 namespace memory {
 
 size_t page_size() {
+  static size_t value = 0;
+  if (!value) {
+    SYSTEM_INFO si;
+    GetSystemInfo(&si);
+    value = si.dwPageSize;
+  }
+  return value;
+}
+
+size_t allocation_granularity() {
   static size_t value = 0;
   if (!value) {
     SYSTEM_INFO si;