fix argument name to PAYLOAD_FIELD

[gkorland]

No description provided.

[codecov]

Codecov Report

Merging #1389 into master will decrease coverage by 0.02%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1389      +/-   ##
==========================================
- Coverage   80.75%   80.73%   -0.03%     
==========================================
  Files         144      144              
  Lines       19899    19899              
==========================================
- Hits        16070    16065       -5     
- Misses       3829     3834       +5     

Impacted Files	Coverage Δ
src/spec.c	88.48% <ø> (ø)
src/rmutil/periodic.c	68.75% <0.00%> (-12.50%)	⬇️
src/cursor.c	96.07% <0.00%> (+0.49%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 3b4333b...e74416e. Read the comment docs.