Warning about failed ImageJ.cfg is displayed even after successful parse

[hinerm]

See https://forum.image.sc/t/request-for-testers-imagej-launcher/44674/23

[imagesc-bot]

This issue has been mentioned on Image.sc Forum. There might be relevant details there:

https://forum.image.sc/t/request-for-testers-imagej-launcher/44674/24

[hinerm]

The problem here is actually that removing a line from the config violates the expected structure of the config file.

When first launching Edit > Options > Memory & Threads an ImageJ.cfg is automatically generated. That's fine, but the java path is carelessly set to the default jre\bin\javaw.exe. That should instead be set to the path to the actual java that is being used.