patch 8.2.4528: crash when using null_function for a partial

Problem:    Crash when using null_function for a partial.
Solution:   Don't call fname_trans_sid() with NULL. (closes #9908)
diff --git a/src/version.c b/src/version.c
index 7945910..f6aaa79 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    4528,
+/**/
     4527,
 /**/
     4526,