+ fix various warnings

src/Mod/Part/App/BSplineSurfacePyImp.cpp

@@ -1281,7 +1281,7 @@ PyObject* BSplineSurfacePy::approximate(PyObject *args)
             Standard_Failure::Raise("not enough points given");
         }
 
-        GeomAbs_Shape c;
+        GeomAbs_Shape c = GeomAbs_CN;
         switch(continuity){
         case 0:
             c = GeomAbs_C0;

src/Mod/Part/App/Part2DObject.cpp

@@ -215,7 +215,7 @@ bool Part2DObject::seekTrimPoints(const std::vector<Geometry *> &geomlist,
     gp_Pln plane(gp_Pnt(0,0,0),gp_Dir(0,0,1));
 
     Standard_Boolean periodic=Standard_False;
-    double period;
+    double period = 0;
     Handle_Geom2d_Curve primaryCurve;
     Handle_Geom_Geometry geom = (geomlist[GeoId])->handle();
     Handle_Geom_Curve curve3d = Handle_Geom_Curve::DownCast(geom);

src/Mod/Part/App/TopoShapePyImp.cpp

@@ -1748,18 +1748,21 @@ PyObject* TopoShapePy::distToShape(PyObject *args)
                     pSuppType1 = PyString_FromString("Vertex");
                     pSupportIndex1 = _getSupportIndex("Vertex",ts1,suppS1);
                     pParm1 = Py_None;
+                    pParm2 = Py_None;
                     break;
                 case BRepExtrema_IsOnEdge:
                     pSuppType1 = PyString_FromString("Edge");
                     pSupportIndex1 = _getSupportIndex("Edge",ts1,suppS1);
                     extss.ParOnEdgeS1(i,t1);
                     pParm1 = PyFloat_FromDouble(t1);
+                    pParm2 = Py_None;
                     break;
                 case BRepExtrema_IsInFace:
                     pSuppType1 = PyString_FromString("Face");
                     pSupportIndex1 = _getSupportIndex("Face",ts1,suppS1);
                     extss.ParOnFaceS1(i,u1,v1);
                     pParm1 = PyTuple_New(2);
+                    pParm2 = Py_None;
                     PyTuple_SetItem(pParm1,0,PyFloat_FromDouble(u1));
                     PyTuple_SetItem(pParm1,1,PyFloat_FromDouble(v1));
                     break;
@@ -1768,6 +1771,7 @@ PyObject* TopoShapePy::distToShape(PyObject *args)
                     pSuppType1 = PyString_FromString("Unknown");
                     pSupportIndex1 = PyInt_FromLong(-1);
                     pParm1 = Py_None;
+                    pParm2 = Py_None;
             }
 
             P2 = extss.PointOnShape2(i);

src/Mod/Part/Gui/CrossSections.cpp

@@ -333,7 +333,7 @@ void CrossSections::on_sectionsBox_toggled(bool b)
     else {
         CrossSections::Plane type = plane();
         Base::Vector3d c = bbox.CalcCenter();
-        double value;
+        double value = 0;
         switch (type) {
             case CrossSections::XY:
                 value = c.z;
@@ -362,7 +362,7 @@ void CrossSections::on_checkBothSides_toggled(bool b)
 void CrossSections::on_countSections_valueChanged(int v)
 {
     CrossSections::Plane type = plane();
-    double dist;
+    double dist = 0;
     switch (type) {
         case CrossSections::XY:
             dist = bbox.LengthZ() / v;