gtGetFullImage: added edf header recycling

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

2_difspot/gtGetFullImage.m

-function [im, info] = gtGetFullImage(n, parameters)
+function [im, info] = gtGetFullImage(n, parameters, info)
 % GTGETFULLIMAGE  Gets the full image number n
 %                         
 %     im = gtGetFullImage(n[, parameters])
@@ -24,5 +24,12 @@ function [im, info] = gtGetFullImage(n, parameters)
         dir = pwd();
     end
 
-    [im, info] =  edf_read(fullfile(dir, '1_preprocessing', 'full', sprintf('full%04d.edf',n)));
-end % end of function
+    full_image_name = fullfile(dir, ...
+        '1_preprocessing', 'full', sprintf('full%04d.edf', n) );
+
+    if (exist('info', 'var') && ~isempty(info))
+        [im, info] = edf_read(full_image_name, [], false, info);
+    else
+        [im, info] = edf_read(full_image_name);
+    end
+end