+ fix -Wnull-conversion, -Woverloaded-virtual, -Wlogical-not-parentheses, -Wsometimes-uninitialized

src/Mod/PartDesign/App/FeatureDraft.cpp

@@ -146,7 +146,7 @@ App::DocumentObjectExecReturn *Draft::execute(void)
         TopoDS_Shape face = TopShape.getSubShape(SubVals[0].c_str());
         TopTools_IndexedMapOfShape mapOfEdges;
         TopExp::MapShapes(face, TopAbs_EDGE, mapOfEdges);
-        bool found;
+        bool found = false;
 
         for (int i = 1; i <= mapOfEdges.Extent(); i++) {
             // Note: What happens if mapOfEdges(i) is the degenerated edge of a cone?
@@ -212,7 +212,7 @@ App::DocumentObjectExecReturn *Draft::execute(void)
                 if (refEdge.IsNull())
                     throw Base::Exception("Failed to extract neutral plane reference edge");
                 BRepAdaptor_Curve c(refEdge);
-                if (!c.GetType() == GeomAbs_Line)
+                if (c.GetType() != GeomAbs_Line)
                     throw Base::Exception("Neutral plane reference edge must be linear");
                 double a = c.Line().Angle(gp_Lin(c.Value(c.FirstParameter()), pullDirection));
                 if (std::fabs(a - M_PI_2) > Precision::Confusion())