patch 7.4.1877

Problem:    No test for invoking "close_cb" when writing to a buffer.
Solution:   Add using close_cb to a test case.

src/version.c

@@ -753,6 +753,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1877,
 /**/
     1876,
 /**/