Warning fixes found under hardest mode of OpenWatcom. Seems clean in Borland, MinGW and DMC.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@29683 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

samples/docvwmdi/doc.h

@@ -35,12 +35,12 @@ class DoodleSegment: public wxObject
  public:
   wxList lines;
 
-  DoodleSegment(void);
+  DoodleSegment(void){};
   DoodleSegment(DoodleSegment& seg);
   ~DoodleSegment(void);
 
   void Draw(wxDC *dc);
-  
+
 #if wxUSE_STD_IOSTREAM
   wxSTD ostream& SaveObject(wxSTD ostream& text_stream);
   wxSTD istream& LoadObject(wxSTD istream& text_stream);
@@ -56,8 +56,8 @@ class DrawingDocument: public wxDocument
  private:
  public:
   wxList doodleSegments;
-  
-  DrawingDocument(void);
+
+  DrawingDocument(void){};
   ~DrawingDocument(void);
 
 #if wxUSE_STD_IOSTREAM