patch 8.2.3545: setcellwidths() may make 'listchars' or 'fillchars' invalid

Problem:    setcellwidths() may make 'listchars' or 'fillchars' invalid.
Solution:   Check the value and give an error. (closes #9024)
diff --git a/src/version.c b/src/version.c
index 227db82..072d11f 100644
--- a/src/version.c
+++ b/src/version.c
@@ -758,6 +758,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    3545,
+/**/
     3544,
 /**/
     3543,