patch 8.2.4075: test failures

Problem:    Test failures.
Solution:   Change check for NULL pointer.
diff --git a/src/version.c b/src/version.c
index 1f4a031..ba6e5da 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    4075,
+/**/
     4074,
 /**/
     4073,