Fix for issue #390: object.GetHashCode not working

[MatthiasJentsch]

Description

I've improved the GetHashCode method and return the CRC32 of the heap block address if the instance has no fields.

Motivation and Context

• Fixes object.GetHashCode not working Home#390

How Has This Been Tested?

object a = new object();
object b = new object();
object c = a;
int ha = a.GetHashCode();
int hb = b.GetHashCode();
int hc = c.GetHashCode();

With the code changes ha, hb and hc are no longer zero and ha equals hc because that's the same object.

Types of changes

• Improvement (non-breaking change that improves a feature, code or algorithm)
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

Signed-off-by: Matthias Jentsch info@matthias-jentsch.de

[nfbot]

Hi @MatthiasJentsch,

I'm nanoFramework bot.
Thank you for your contribution!

A human will be reviewing it shortly. 😉

[josesimoes]

Perfect!