Definite-initialisation check incorrectly flags loop counters in .fn scripts as uninitialised

[mxmxmx888]

There appears to be a validator issue in the MDEO script language for .fn files. Variables that are explicitly initialised before use in while loop conditions are still reported as “used before being initialized”.

Actual behaviour:
The validator reports:
Identifier countDay is used before being initialized.

Expected behaviour:
countDay should be recognised as definitely initialised, since it is assigned 0 before being used in the while condition.