Fix filcker

MapperGLCanvas.cpp

@@ -40,7 +40,7 @@ MapperGLCanvas::MapperGLCanvas(wxFrame *parent) :
 }
 
 void MapperGLCanvas::Paintit(wxPaintEvent& WXUNUSED(event)) {
-  GetParent()->Refresh();
+  //GetParent()->Refresh();
   Render();
 }
 
@@ -119,7 +119,7 @@ void MapperGLCanvas::enterRender() {
 }
 
 void MapperGLCanvas::exitRender() {
-  glFlush();
+	glFlush();
   SwapBuffers();
 }