patch 7.4.1261

Problem:    Pending channel messages are garbage collected. Leaking memory in
            ch_sendexpr().  Leaking memory for a decoded JSON string.
Solution:   Mark the message list as used. Free the encoded JSON.  Don't save
            the JSON string.

src/version.c

@@ -742,6 +742,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1261,
 /**/
     1260,
 /**/