patch 7.4.1123
Problem:    Using ":argadd" when there are no arguments results in the second
            argument to be the current one. (Yegappan Lakshmanan)
Solution:   Correct the w_arg_idx value.
diff --git a/src/version.c b/src/version.c
index 76e176a..09176eb 100644
--- a/src/version.c
+++ b/src/version.c
@@ -742,6 +742,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1123,
+/**/
     1122,
 /**/
     1121,