patch 8.2.4426: map() function on string and blob does not check types

Problem:    map() function on string and blob does not check argument types at
            compile time.
Solution:   Check string and blob argument types.  Support "0z1234->func()".
diff --git a/src/version.c b/src/version.c
index 1fdf4e4..6c5ca2b 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    4426,
+/**/
     4425,
 /**/
     4424,