patch 8.2.4788: large payload for LSP message not tested

Problem:    Large payload for LSP message not tested.
Solution:   Add a test with a large LSP payload. (Yegappan Lakshmanan,
            closes #10223)

src/version.c

@@ -746,6 +746,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    4788,
 /**/
     4787,
 /**/