patch 8.0.0858: can exit while a terminal is still running a job

Problem:    Can exit while a terminal is still running a job.
Solution:   Consider a buffer with a running job like a changed file.
diff --git a/src/ex_cmds2.c b/src/ex_cmds2.c
index 381c5d1..26b588c 100644
--- a/src/ex_cmds2.c
+++ b/src/ex_cmds2.c
@@ -2064,7 +2064,7 @@
     int
 can_abandon(buf_T *buf, int forceit)
 {
-    return (	   P_HID(buf)
+    return (	   buf_hide(buf)
 		|| !bufIsChanged(buf)
 		|| buf->b_nwindows > 1
 		|| autowrite(buf, forceit) == OK
@@ -2180,7 +2180,14 @@
 	    msg_col = 0;
 	    msg_didout = FALSE;
 	}
-	if (EMSG2(_("E162: No write since last change for buffer \"%s\""),
+	if (
+#ifdef FEAT_TERMINAL
+		term_job_running(buf->b_term)
+		    ? EMSG2(_("E947: Job still running in buffer \"%s\""),
+								  buf->b_fname)
+		    :
+#endif
+		EMSG2(_("E162: No write since last change for buffer \"%s\""),
 		    buf_spname(buf) != NULL ? buf_spname(buf) : buf->b_fname))
 	{
 	    save = no_wait_return;
@@ -2734,13 +2741,13 @@
 	     * the same buffer
 	     */
 	    other = TRUE;
-	    if (P_HID(curbuf))
+	    if (buf_hide(curbuf))
 	    {
 		p = fix_fname(alist_name(&ARGLIST[argn]));
 		other = otherfile(p);
 		vim_free(p);
 	    }
-	    if ((!P_HID(curbuf) || !other)
+	    if ((!buf_hide(curbuf) || !other)
 		  && check_changed(curbuf, CCGD_AW
 					 | (other ? 0 : CCGD_MULTWIN)
 					 | (eap->forceit ? CCGD_FORCEIT : 0)
@@ -2761,7 +2768,7 @@
 	 * argument index. */
 	if (do_ecmd(0, alist_name(&ARGLIST[curwin->w_arg_idx]), NULL,
 		      eap, ECMD_LAST,
-		      (P_HID(curwin->w_buffer) ? ECMD_HIDE : 0)
+		      (buf_hide(curwin->w_buffer) ? ECMD_HIDE : 0)
 			 + (eap->forceit ? ECMD_FORCEIT : 0), curwin) == FAIL)
 	    curwin->w_arg_idx = old_arg_idx;
 	/* like Vi: set the mark where the cursor is in the file. */
@@ -2782,7 +2789,7 @@
      * check for changed buffer now, if this fails the argument list is not
      * redefined.
      */
-    if (       P_HID(curbuf)
+    if (       buf_hide(curbuf)
 	    || eap->cmdidx == CMD_snext
 	    || !check_changed(curbuf, CCGD_AW
 				    | (eap->forceit ? CCGD_FORCEIT : 0)
@@ -2937,7 +2944,7 @@
 
     if (eap->cmdidx == CMD_windo
 	    || eap->cmdidx == CMD_tabdo
-	    || P_HID(curbuf)
+	    || buf_hide(curbuf)
 	    || !check_changed(curbuf, CCGD_AW
 				    | (eap->forceit ? CCGD_FORCEIT : 0)
 				    | CCGD_EXCMD))