improve clarity when member is not exist

[chx9]

this pr aims to fix one of the issues from Redis Triage
redis/redis#13350
it has been more than 1 year since this issue brought up

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 70.93%. Comparing base (44dafba) to head (a96996a).

Additional details and impacted files

@@             Coverage Diff              @@
##           unstable    #1943      +/-   ##
============================================
- Coverage     70.99%   70.93%   -0.06%     
============================================
  Files           123      123              
  Lines         65769    65770       +1     
============================================
- Hits          46693    46656      -37     
- Misses        19076    19114      +38     

Files with missing lines	Coverage Δ
src/geo.c	93.59% <100.00%> (+0.01%)	⬆️

... and 15 files with indirect coverage changes

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[Fusl]

longLatFromMember can also return C_ERR if geohashDecodeToLongLatType returns a decoding error while the member did exist. Should we maybe differentiate those cases or just return member %s does not exist or failed to decode?

[madolson]

longLatFromMember can also return C_ERR if geohashDecodeToLongLatType returns a decoding error while the member did exist. Should we maybe differentiate those cases or just return member %s does not exist or failed to decode?

Ideally yes. It would be nice to differentiate the member be missing from some type of corruption.

[chx9]

longLatFromMember can also return C_ERR if geohashDecodeToLongLatType returns a decoding error while the member did exist. Should we maybe differentiate those cases or just return member %s does not exist or failed to decode?

Ideally yes. It would be nice to differentiate the member be missing from some type of corruption.

agree, i added error infomation for each case.