Initialize one variable in struct to avoid risk

[hwware]

In C, we had better initialize every variable in struct, this PR fixes one missed variable Initialization.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 70.84%. Comparing base (f251078) to head (16193dd).
Report is 10 commits behind head on unstable.

Additional details and impacted files

@@             Coverage Diff              @@
##           unstable    #1606      +/-   ##
============================================
- Coverage     71.00%   70.84%   -0.16%     
============================================
  Files           121      121              
  Lines         65139    65175      +36     
============================================
- Hits          46249    46175      -74     
- Misses        18890    19000     +110     

Files with missing lines	Coverage Δ
src/cluster_legacy.c	87.23% <100.00%> (+0.06%)	⬆️

... and 19 files with indirect coverage changes

[enjoy-binbin]

let's move it near the failover_auth_rank

[hwware]

let's move it near the failover_auth_rank

Addressed. Thanks