WAF Scope Distance Bugfix

[TheTechromancer]

Fixes #651.

[codecov]

Codecov Report

Merging #744 (c43b30c) into dev (ba4fc61) will increase coverage by 1%.
Report is 5 commits behind head on dev.
The diff coverage is 93%.

@@          Coverage Diff          @@
##             dev    #744   +/-   ##
=====================================
+ Coverage     92%     92%   +1%     
=====================================
  Files        284     284           
  Lines      16679   16692   +13     
=====================================
+ Hits       15230   15252   +22     
+ Misses      1449    1440    -9     

Files Changed	Coverage Δ
bbot/core/event/base.py	95% <91%> (-<1%)	⬇️
bbot/modules/wafw00f.py	83% <100%> (ø)

... and 4 files with indirect coverage changes

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