Gui: modernize C++: use default member init

src/Gui/SoFCSelectionAction.cpp

@@ -692,7 +692,7 @@ void SoFCDocumentObjectAction::finish()
   atexit_cleanup();
 }
 
-SoFCDocumentObjectAction::SoFCDocumentObjectAction () : _handled(false)
+SoFCDocumentObjectAction::SoFCDocumentObjectAction()
 {
   SO_ACTION_CONSTRUCTOR(SoFCDocumentObjectAction);
 }
@@ -760,7 +760,7 @@ void SoGLSelectAction::initClass()
 
 SoGLSelectAction::SoGLSelectAction (const SbViewportRegion& region,
                                     const SbViewportRegion& select)
-  : vpregion(region), vpselect(select), _handled(false)
+  : vpregion(region), vpselect(select)
 {
   SO_ACTION_CONSTRUCTOR(SoGLSelectAction);
 }
@@ -833,7 +833,7 @@ void SoVisibleFaceAction::initClass()
   SO_ACTION_ADD_METHOD(SoFCSelection,callDoAction);
 }
 
-SoVisibleFaceAction::SoVisibleFaceAction () : _handled(false)
+SoVisibleFaceAction::SoVisibleFaceAction ()
 {
   SO_ACTION_CONSTRUCTOR(SoVisibleFaceAction);
 }
@@ -930,33 +930,21 @@ class SoBoxSelectionRenderActionP {
 public:
     SoBoxSelectionRenderActionP(SoBoxSelectionRenderAction * master)
       : master(master)
-      , searchaction(nullptr)
-      , selectsearch(nullptr)
-      , camerasearch(nullptr)
-      , bboxaction(nullptr)
-      , basecolor(nullptr)
-      , postprocpath(nullptr)
-      , highlightPath(nullptr)
-      , localRoot(nullptr)
-      , xform(nullptr)
-      , cube(nullptr)
-      , drawstyle(nullptr)
     {
-
     }
 
     SoBoxSelectionRenderAction * master;
-    SoSearchAction * searchaction;
-    SoSearchAction * selectsearch;
-    SoSearchAction * camerasearch;
-    SoGetBoundingBoxAction * bboxaction;
-    SoBaseColor * basecolor;
-    SoTempPath * postprocpath;
-    SoPath * highlightPath;
-    SoSeparator * localRoot;
-    SoMatrixTransform * xform;
-    SoCube * cube;
-    SoDrawStyle * drawstyle;
+    SoSearchAction * searchaction{nullptr};
+    SoSearchAction * selectsearch{nullptr};
+    SoSearchAction * camerasearch{nullptr};
+    SoGetBoundingBoxAction * bboxaction{nullptr};
+    SoBaseColor * basecolor{nullptr};
+    SoTempPath * postprocpath{nullptr};
+    SoPath * highlightPath{nullptr};
+    SoSeparator * localRoot{nullptr};
+    SoMatrixTransform * xform{nullptr};
+    SoCube * cube{nullptr};
+    SoDrawStyle * drawstyle{nullptr};
     SoColorPacker colorpacker;
 
     void initBoxGraph();