Fixed border pixel error in GtVolView

Signed-off-by: Nicola Vigano <nicola.vigano@esrf.fr>

zUtil_TomoUtils/GtVolView.m

@@ -244,6 +244,8 @@ classdef GtVolView < GtBaseGuiElem
         % GTVOLVIEW/GET3DPIXELINFO Returns the value and the point where the
         % pointer is now over in respect to the volume stored in the object
             point = round(obj.get3DPixelInfo());
+            % At the border, rounding gives a wrong pixel position
+            point = min(point, size(obj.conf.vol));
             value = obj.getVolValue(point);
         end
     end