unity的.net 4下，object obj = new sbyte[] { 1, 2 };obj is byte[]会判断为true…

…，修改为兼容性更好的写法，防止sbyte[] 在.net 4下push到lua变成字符串

Assets/XLua/Src/ObjectTranslator.cs

@@ -1148,7 +1148,7 @@ public void PushAny(RealStatePtr L, object o)
             {
                 LuaAPI.lua_pushstring(L, o as string);
             }
-            else if (o is byte[])
+            else if (type == typeof(byte[]))
             {
                 LuaAPI.lua_pushstring(L, o as byte[]);
             }