patch 8.2.4432: cannot use settabvar() while the cmdline window is open

Problem:    Cannot use settabvar() while the cmdline window is open.
Solution:   Only give an error when actually switching tabpage.
            (closes #9813)

src/version.c

@@ -750,6 +750,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    4432,
 /**/
     4431,
 /**/