Coverity warnings fixed:
CID 316559 (#1 of 1): Uninitialized scalar variable (UNINIT)
3. uninit_use_in_call: Using uninitialized value we. Field we.idx is uninitialized when calling push_back
CID 316549 (#1 of 1): Uninitialized scalar field (UNINIT_CTOR)
4. uninit_member: Non-static class member pageheight is not initialized in this constructor nor in any functions that it calls.
CID 186161 (#1 of 1): Uninitialized pointer field (UNINIT_CTOR)
2. uninit_member: Non-static class member parent is not initialized in this constructor nor in any functions that it calls.
CID 305170 (#1 of 1): Dereference before null check (REVERSE_INULL)
check_after_deref: Null-checking this->m_baseFeat suggests that it may be null, but it has already been dereferenced on all paths leading to the check.
CID 186152 (#2 of 2): Uninitialized pointer field (UNINIT_CTOR)
3. uninit_member: Non-static class member m_mdi is not initialized in this constructor nor in any functions that it calls.
CID 192588 (#1 of 1): Same on both sides (CONSTANT_EXPRESSION_RESULT)
pointless_expression
Some "valid" shapes are being passed to findShapeOutline where edges
that should be connected are in fact separated 10x the expected tolerance
(2*Precision::Confusion) for 2 overlapping TopoDS_Vertex.
IntTools_Tools:ComputeVV also reports these Vertices as further apart than
their combined tolerances should allow.
This change introduces a tolerance into DrawUtil and EdgeWalker vertex
comparisions that is quite "sloppy" (0.00001) but which handles the sample
objects correctly. This tolerance is adequate for drawings. Other uses
should be considered on case by case basis.
