patch 8.0.1795: lose contact with jobs when :gui forks

Problem:    Lose contact with jobs when :gui forks.
Solution:   Don't fork when there is a running job. Make log message for a
            died job clearer.  Also close the terminal when stderr and stdout
            are the same FD.
diff --git a/src/version.c b/src/version.c
index a73c485..7a28f46 100644
--- a/src/version.c
+++ b/src/version.c
@@ -762,6 +762,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1795,
+/**/
     1794,
 /**/
     1793,