FlagInterps uses memset(TempFloat, 0, …) then NormalizeExtrap divides by TempFloat[NormIdx] if > 0 but never clears cells with == 0

[XenonofArcticus]

Where: DEFG::FlagInterps and DEFG::NormalizeExtrap

Why it’s wrong: Cells flagged for interpolation that never receive any weight remain permanently marked (TempBuf[NormIdx] stays 1) and never become infectious; if later code expects a cleared/terminal state, this can stall iterative passes or leave unreachable cells.

Evidence: Logic in both functions.
GitHub

Fix: After an extrapolation pass, detect TempBuf && TempFloat==0 and either mark as non-interpolable or assign NullVal; ensure the driving loop terminates.