Fix check denom

[fedekunze]

closes #4598

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[alexanderbez]

ACK ☕️

Might be worth adding a simple test case for this though.

[alessio]

Pending test case

[rigelrozanski]

Looks good. THANKS
if there ever ends up being another check common to delegation/redelegation/undelegation we should create a "validate basic" function for all handlers to run through. not there yet though!

[codecov]

Codecov Report

Merging #4600 into master will increase coverage by 0.03%.
The diff coverage is 66.66%.

@@            Coverage Diff             @@
##           master    #4600      +/-   ##
==========================================
+ Coverage   52.76%   52.79%   +0.03%     
==========================================
  Files         264      264              
  Lines       16464    16468       +4     
==========================================
+ Hits         8687     8695       +8     
+ Misses       7128     7126       -2     
+ Partials      649      647       -2

[alessio]

Looks even better now 👍

[alexanderbez]

ACK