Add MxSize32, match MxRegion ctor

LEGO1/mxsize32.h

@@ -0,0 +1,20 @@
+#ifndef MXSIZE32_H
+#define MXSIZE32_H
+
+#include "mxtypes.h"
+
+class MxSize32
+{
+public:
+  MxSize32() { }
+  MxSize32(MxS32 p_width, MxS32 p_height)
+  {
+    this->m_width = p_width;
+    this->m_height = p_height;
+  }
+
+  MxS32 m_width;
+  MxS32 m_height;
+};
+
+#endif // MXSIZE32_H