JsfVersion might not be known, so null case must be handled

[matthiasblaesing]

Closes: #7213

[BetoValle]

Hi, Matthias

"I thought" that if I downloaded the compressed netbeans from "artifacts", unzipped it in a temporary folder I could check this update they made. I did this and I can't load netBeans because it displays the message:
"Cannot run on older versions of Java than Java 17.
Please install Java 17 or newer or use --jdkhome
“switch to point to its installation directory."

See that I use java11! in the netbeans.conf file (in this temporary folder where I installed it to test) I informed
the correct folder for the --jdkhome parameter
but for some other reason he doesn't obey!

I forced netbeans to load in the line command with the parameter
--jdkhome (+ the correct folder) and it didn't work either because it displays the same message above!

Therefore, as I have no knowledge of what could be happening with the netBeans load that they modified, I have no way of testing it. OR otherwise could you give some instructions.

Thanks

[ebarboni]

LGTM

[matthiasblaesing]

@ebarboni thanks for checking. This was tested successfully. The problem of the reporter were caused by a bit surprising auto-update behavior coupled with a prior merged PR.