SCons

* ensure all SConscripts are ready for win64-vc (where necessary).
* ensure we have proper _DEBUG flag for Python when we're doing a debug build.
* some cleaning up of linking etc.
* ensure /EHsc is there for game engine modules.

source/gameengine/Rasterizer/SConscript

@@ -8,8 +8,9 @@ incs = '. #source/kernel/gen_system #intern/string #intern/moto/include #source/
 incs += ' ' + env['BF_PYTHON_INC']
 
 cxxflags = []
-if env['OURPLATFORM']=='win32-vc':
+if env['OURPLATFORM'] in ('win32-vc', 'win64-vc'):
 	cxxflags.append ('/GR')
 	cxxflags.append ('/O2')
+	cxxflags.append ('/EHsc')
 
 env.BlenderLib ( 'bf_rasterizer', sources, Split(incs), [], libtype=['core','player'], priority=[350,115], cxx_compileflags = cxxflags )