vim-patch:7.4.361

Problem:    Lots of flickering when filling the preview window for 'omnifunc'.
Solution:   Disable redrawing. (Hirohito Higashi)

https://code.google.com/p/vim/source/detail?r=v7-4-361

src/nvim/popupmnu.c

@@ -541,7 +541,9 @@ static int pum_set_selected(int n, int repeat)
       if ((p_pvh > 0) && (p_pvh < g_do_tagpreview)) {
         g_do_tagpreview = p_pvh;
       }
+      RedrawingDisabled++;
       resized = prepare_tagpreview(false);
+      RedrawingDisabled--;
       g_do_tagpreview = 0;
 
       if (curwin->w_p_pvw) {