patch 8.2.2666: Vim9: not enough function arguments checked for string

Problem:    Vim9: not enough function arguments checked for string.
Solution:   Check in ch_logfile(), char2nr() and others.

src/version.c

@@ -750,6 +750,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2666,
 /**/
     2665,
 /**/