patch 8.2.4847: crash when using uninitialized function pointer

Problem:    Crash when using uninitialized function pointer.
Solution:   Check for NULL pointer. (closes #10319, closes #10319)
diff --git a/src/version.c b/src/version.c
index eddc6c9..ee5a9ab 100644
--- a/src/version.c
+++ b/src/version.c
@@ -747,6 +747,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    4847,
+/**/
     4846,
 /**/
     4845,