fix: bug in maker-cli show-fidelity rpc call

[VanshulB]

fixes #430

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 11 lines in your changes missing coverage. Please review.

Project coverage is 70.92%. Comparing base (b9b3ff2) to head (6cdf13d).
Report is 3 commits behind head on master.

Files with missing lines	Patch %	Lines
src/wallet/fidelity.rs	0.00%	10 Missing ⚠️
src/maker/rpc/messages.rs	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #436      +/-   ##
==========================================
+ Coverage   70.88%   70.92%   +0.04%     
==========================================
  Files          32       32              
  Lines        4272     4279       +7     
==========================================
+ Hits         3028     3035       +7     
  Misses       1244     1244              

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[mojoX911]

Ack