patch 7.4.1119

Problem:    argidx() has a wrong value after ":%argdelete". (Yegappan
            Lakshmanan)
Solution:   Correct the value of w_arg_idx.  Add a test.

src/version.c

@@ -741,6 +741,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1119,
 /**/
     1118,
 /**/