handle naming issue properly

[Tarcontar]

Turns out is a valid scenario that a mesh has the same name as a bone, but in that case the mesh has to be configured properly. So it has to be either

• have an armature modifier, a vertex group with the same name as the mesh and valid bone weights or
• have the armature object as parent and the parent bone must be the bone with the identical name

[codecov[bot]]

Codecov Report

Merging #216 (bffdeb8) into master (286ba84) will increase coverage by 0.00%. The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #216   +/-   ##
=======================================
  Coverage   95.14%   95.14%           
=======================================
  Files          52       52           
  Lines        4637     4639    +2     
  Branches      807      808    +1     
=======================================
+ Hits         4412     4414    +2     
  Misses        222      222           
  Partials        3        3           

Impacted Files	Coverage Δ
io_mesh_w3d/common/utils/mesh_export.py	100.00% <100.00%> (ø)

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