patch 8.0.0779: :term without an argument uses empty buffer name

Problem:    :term without an argument uses empty buffer name but runs the
            snell.
Solution:   Change the command to the shell earlier.

Author: brammool

src/terminal.c

@@ -199,6 +199,9 @@ ex_terminal(exarg_T *eap)
     term->tl_next = first_term;
     first_term = term;
 
+    if (cmd == NULL || *cmd == NUL)
+	cmd = p_sh;
+
     if (buflist_findname(cmd) == NULL)
 	curbuf->b_ffname = vim_strsave(cmd);
     else
@@ -227,9 +230,6 @@ ex_terminal(exarg_T *eap)
 
     set_term_and_win_size(term);
 
-    if (cmd == NULL || *cmd == NUL)
-	cmd = p_sh;
-
     /* System dependent: setup the vterm and start the job in it. */
     if (term_and_job_init(term, term->tl_rows, term->tl_cols, cmd) == OK)
     {

src/version.c

@@ -769,6 +769,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    779,
 /**/
     778,
 /**/