To fix memory leak for invalid payload type

[sadhyama]

No description provided.

[codecov]

Codecov Report

Merging #50 into master will decrease coverage by 0.09%.
The diff coverage is 0%.

@@            Coverage Diff            @@
##           master      #50     +/-   ##
=========================================
- Coverage   90.41%   90.31%   -0.1%     
=========================================
  Files           3        3             
  Lines        1888     1890      +2     
  Branches      201      202      +1     
=========================================
  Hits         1707     1707             
- Misses         57       59      +2     
  Partials      124      124

Impacted Files	Coverage Δ
src/wdmp-c.c	76.78% <0%> (-0.93%)	⬇️

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