only overwrite xTicks if they are provided as a function argument. Otherwise accept Matlab xTicks

(cherry picked from commit 51b25e9cd57ae10b3844d6ca3dcde914e0c97d28)

MatlabFiles/fn_imcgraph.m

@@ -82,7 +82,9 @@ if indxGimfml
          subplot(nvar,nvar,k1)
          plot(t,imf(:,k2),t,zeros(length(imf(:,k2)),1),'r:');
 
-         set(gca,'XTick',xTick)
+		 if ~isempty(xTick)
+			 set(gca,'XTick',xTick)
+		 end
          set(gca,'YTick',yt)
          grid
 
@@ -93,10 +95,7 @@ if indxGimfml
          %  end
 
 
-         if isempty(xTick)  %1     % No numbers on both axes
-            set(gca,'XTickLabel',' ');
-            set(gca,'YTickLabel',' ');
-         else   % Put numbers on both axes
+         if ~isempty(xTick)
             if i<nvar
                set(gca,'XTickLabelMode','manual','XTickLabel',[])
             end