patch 7.4.1504

Problem:    No test for reading last-but-one line.
Solution:   Add a test.

src/version.c

@@ -743,6 +743,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1504,
 /**/
     1503,
 /**/