patch 8.2.4774: crash when using a number for lambda name

Problem:    Crash when using a number for lambda name.
Solution:   Check the type of the lambda reference.
diff --git a/src/version.c b/src/version.c
index bdefc25..43e85e7 100644
--- a/src/version.c
+++ b/src/version.c
@@ -747,6 +747,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    4774,
+/**/
     4773,
 /**/
     4772,