patch 9.0.1171: screen is not redrawn after using setcellwidths()

Problem:    Screen is not redrawn after using setcellwidths().
Solution:   Redraw the screen when the cell widths have changed. (Yasuhiro
            Matsumoto, closes #11800)
diff --git a/src/version.c b/src/version.c
index b3efaab..da397ee 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1171,
+/**/
     1170,
 /**/
     1169,