miner gas calculate fix

[ucwong]

No description provided.

[codecov]

Codecov Report

Merging #1668 (9b6ca64) into master (802ce1c) will increase coverage by 0.05%.
Report is 6 commits behind head on master.
The diff coverage is 6.25%.

❗ Current head 9b6ca64 differs from pull request most recent head 358b4d3. Consider uploading reports for the commit 358b4d3 to get more accurate results

@@            Coverage Diff             @@
##           master    #1668      +/-   ##
==========================================
+ Coverage   52.55%   52.60%   +0.05%     
==========================================
  Files         481      481              
  Lines       60233    60233              
==========================================
+ Hits        31653    31686      +33     
+ Misses      26174    26132      -42     
- Partials     2406     2415       +9     

Files Changed	Coverage Δ
core/block_validator.go	41.17% <0.00%> (-1.69%)	⬇️
ctxc/config.go	40.00% <ø> (ø)
log/format.go	44.80% <0.00%> (+0.43%)	⬆️
log/handler_glog.go	0.00% <0.00%> (ø)
miner/miner.go	0.00% <ø> (ø)
miner/worker.go	0.00% <0.00%> (ø)
consensus/cuckoo/consensus.go	8.69% <100.00%> (+1.44%)	⬆️

... and 13 files with indirect coverage changes