patch 8.2.4541: Crash in debugger when a variable is not available

Problem:    Crash in debugger when a variable is not available in the current
            block.
Solution:   Check for a NULL name. (closes #9926)
diff --git a/src/version.c b/src/version.c
index 2947790..122ba03 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    4541,
+/**/
     4540,
 /**/
     4539,