When warnings are enabled, compilers report lots of occurrences
of unused local variables, which makes it harder to find other
meaningful warnings.
This commit does not fix all unused local variables.
Fix new type conversion warning
Code cleaned to avoid MSVC compiler warnings on unused function arguments.
Several useless pieces of code are removed.
Changes in IntTools_EdgeFace.cxx, Blend_Walking_1.gxx, Bnd_BoundSortBox.cxx, ProjLib_ProjectedCurve.cxx are reverted (separated to specific issue for more in-depth analysis).
1. Function QuasiFleche(...) does not call for small edges.
2. Forbid to work with NULL-shapes in OffsetWire::FixHoles(...) function.
3. ProjOnCurve(...) function in Bisector_BisecCC.cxx file returns status (DONE or NOT DONE).
