patch 7.4.1565

Problem:    Crash when assert_equal() runs into a NULL string.
Solution:   Check for NULL. (Dominique) Add a test.

src/version.c

@@ -743,6 +743,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1565,
 /**/
     1564,
 /**/