[common] added agnostic function sysinfo_getPageSize

common/src/platform/windows/sysinfo.c

@@ -17,8 +17,17 @@ this program; if not, write to the Free Software Foundation, Inc., 59 Temple
 Place, Suite 330, Boston, MA 02111-1307 USA
 */
 
+#include <windows.h>
+
 int sysinfo_gfx_max_multisample()
 {
   //FIXME: Implement this
   return 4;
+}
+
+long sysinfo_getPageSize()
+{
+  SYSTEM_INFO si;
+  GetSystemInfo(&si);
+  return si.dwPageSize;
 }