[bug-fix] Fix null ref exception in the demo recorder

[ervteng]

Proposed change(s)

A null reference exception was being thrown when Num Steps to Record was > 0 AND the Record checkbox was unticked.

Types of change(s)

• Bug fix
• New feature
• Code refactor
• Breaking change
• Documentation update
• Other (please describe)

Checklist

• Added tests that prove my fix is effective or that my feature works
• Updated the changelog (if applicable)
• Updated the documentation (if applicable)
• Updated the migration guide (if applicable)

Other comments

[vincentpierre]

Looks good, but for clarity, I would do :

 if( !Record){ 
     return;
  } 

 *rest of the code*

[ervteng]

Looks good, but for clarity, I would do :

 if( !Record){ 
     return;
  } 

 *rest of the code*

Done