patch 7.4.1849

Problem:    Still trying to read from channel that is going to be closed.
            (Ramel Eshed)
Solution:   Check if ch_to_be_closed is set.

src/version.c

@@ -753,6 +753,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1849,
 /**/
     1848,
 /**/