Two quick fixes for building a windows x64 release

extern/caelum/src/Astronomy.cpp

@@ -321,7 +321,7 @@ namespace Caelum
         getGregorianDateTimeFromJulianDay(julianDay, year, month, day, hour, minute, second);
     }
 
-#if (OGRE_PLATFORM == OGRE_PLATFORM_WIN32) && (OGRE_COMPILER == OGRE_COMPILER_MSVC)
+#if (OGRE_PLATFORM == OGRE_PLATFORM_WIN32) && (OGRE_COMPILER == OGRE_COMPILER_MSVC) && (OGRE_ARCH_TYPE != OGRE_ARCHITECTURE_64)
     int Astronomy::enterHighPrecissionFloatingPointMode ()
     {
         int oldMode = ::_controlfp (0, 0);

extern/mygui_3.0.1/MyGUIEngine/src/MyGUI_ClipboardManager.cpp

@@ -62,7 +62,11 @@ namespace MyGUI
 		if (dwProcessID != ::GetCurrentProcessId())
 			return TRUE;
 
+#ifdef _M_X64
+		if (::GetWindowLongPtr(hWnd, GWLP_HINSTANCE) == lParam)
+#else
 		if (::GetWindowLong(hWnd, GWL_HINSTANCE) == lParam)
+#endif
 		{
 			// Нашли. hWnd - то что надо
 			g_hWnd = hWnd;