wxNviz: new flythrough icon added

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@49663 15284696-431f-4ddb-bdfa-cd5b030d7da7

gui/wxpython/icons/icon.py

@@ -342,7 +342,7 @@ Icons = {
         'rotate':   MetaIcon(img = iconSet.get('3d-rotate', wx.ART_ERROR),
                              label = _('Rotate 3D scene'),
                              desc = _('Drag with mouse to rotate 3D scene')), 
-        'flyThrough':   MetaIcon(img = iconSet.get('', wx.ART_MISSING_IMAGE),
+        'flyThrough':   MetaIcon(img = iconSet.get('flythrough', wx.ART_MISSING_IMAGE),
                              label = _('Fly-through mode'),
                              desc = _('Drag with mouse, hold Ctrl down for different mode'
                                       ' or Shift to accelerate')),