add IsInteger field

[snikeguo]

I need to know if Signal is an integer or a float/double, because it needs to be used to generate C code:

public static class SignalExtensions
    {
        public static string GetCppType(this Signal signal)
        {
            string su = string.Empty;
            string type=string.Empty;
            if(signal.IsInteger==true)
            {
                if (signal.IsSigned == 0)
                {
                    su = "u";
                }
                if (signal.Length <= 8)
                {
                    type = "int8_t";
                }
                else if (signal.Length <= 16)
                {
                    type = "int16_t";
                }
                else if (signal.Length <= 32)
                {
                    type = "int32_t";
                }
                else if (signal.Length <= 64)
                {
                    type = "int64_t";
                }
                else
                {
                    throw new Exception("不支持的类型");
                }
                return su + type;
            }
            else
            {
                if (signal.Length <= 32)
                {
                    type = "float";
                }
                else if (signal.Length <= 64)
                {
                    type = "double";
                }
                return type;
            }

        }
    }