patch 8.2.3878: Vim9: debugger tries to read more lines than there are

Problem:    Vim9: debugger tries to read more lines than there are.
Solution:   Check the number of lines. (closes #9394)
diff --git a/src/version.c b/src/version.c
index e310f76..e9d77a9 100644
--- a/src/version.c
+++ b/src/version.c
@@ -750,6 +750,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    3878,
+/**/
     3877,
 /**/
     3876,