patch 8.1.1871: modeless selection in GUI still not correct

Problem:    Modeless selection in GUI still not correct.
Solution:   Fix max_col.
diff --git a/src/version.c b/src/version.c
index 8e2ac30..1d1b3f6 100644
--- a/src/version.c
+++ b/src/version.c
@@ -770,6 +770,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1871,
+/**/
     1870,
 /**/
     1869,