Math.Floor(float) hangs/resets the board on Netduino 3

[steffalk]

VS version: VS 2017 15.8.1
OS version: Windows 10 1803 17134.228
VS extension version: 0.5.0.28
Firmware version: preview-776

This worked about 2 months ago.

Detailed repro steps so we can see the same problem

1. Create a nanoFramework solution:

`
using System;

namespace NFAppTestMathHang
{
public class Program
{
public static void Main()
{
Console.WriteLine("Hello world!");

        float x;

        x = Math.Round(5.5f); // <-- works after Jose´s fix.

        x = Math.Floor(5.5f); // <-- hangs here to the point that the board must be re-flashed!

        Console.WriteLine(x.ToString()); // <-- never arrives here
    }
}

}
`

2. Run it on the board. The board hangs on Math.Floor.

[josesimoes]

Nice catch! (oh how we need unit testing 😢 )

BTW, most of the other math methods would cause this too. I've rework the math calls to fix it for all calls.