Minor change to be more clear with names

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

zUtil_Imaging/gtESF2LSF.m

@@ -94,9 +94,9 @@ function lsf_line = gtESF2LSF(img, varargin)
     lsf = interp1(lsf, linspace(center_pos-lsf_edge, center_pos+lsf_edge, conf.size * conf.oversampling), 'spline');
     switch (conf.side)
         case 'both'
-        case 'left'
+        case 'dark'
             lsf(lsf_edge+2:end) = flip(lsf(1:lsf_edge));
-        case 'right'
+        case 'bright'
             lsf(1:lsf_edge) = flip(lsf(lsf_edge+2:end));
     end
     lsf(lsf < 0) = 0;