patch 8.0.1519: getchangelist() does not use argument as bufname()

Problem:    Getchangelist() does not use argument as bufname().
Solution:   Use get_buf_tv(). (Yegappan Lakshmanan, closes #2641)

src/version.c

@@ -771,6 +771,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1519,
 /**/
     1518,
 /**/