patch 8.0.1382: get "no write since last change" message if terminal is open

Problem:    Get "no write since last change" message if a terminal is open.
            (Fritz mehner)
Solution:   Don't consider a buffer changed if it's a terminal window.

src/ex_cmds.c

@@ -1482,7 +1482,7 @@ do_shell(
 #endif
 		&& msg_silent == 0)
 	FOR_ALL_BUFFERS(buf)
-	    if (bufIsChanged(buf))
+	    if (bufIsChangedNotTerm(buf))
 	    {
 #ifdef FEAT_GUI_MSWIN
 		if (!winstart)

src/proto/undo.pro

@@ -25,6 +25,7 @@ void u_clearline(void);
 void u_undoline(void);
 void u_blockfree(buf_T *buf);
 int bufIsChanged(buf_T *buf);
+int bufIsChangedNotTerm(buf_T *buf);
 int curbufIsChanged(void);
 void u_eval_tree(u_header_T *first_uhp, list_T *list);
 /* vim: set ft=c : */

src/undo.c

@@ -3523,6 +3523,8 @@ u_save_line(linenr_T lnum)
  * Check if the 'modified' flag is set, or 'ff' has changed (only need to
  * check the first character, because it can only be "dos", "unix" or "mac").
  * "nofile" and "scratch" type buffers are considered to always be unchanged.
+ * Also considers a buffer changed when a terminal window contains a running
+ * job.
  */
     int
 bufIsChanged(buf_T *buf)
@@ -3531,6 +3533,15 @@ bufIsChanged(buf_T *buf)
     if (term_job_running(buf->b_term))
 	return TRUE;
 #endif
+    return bufIsChangedNotTerm(buf);
+}
+
+/*
+ * Like bufIsChanged() but ignoring a terminal window.
+ */
+    int
+bufIsChangedNotTerm(buf_T *buf)
+{
     return !bt_dontwrite(buf)
 	&& (buf->b_changed || file_ff_differs(buf, TRUE));
 }

src/version.c

@@ -771,6 +771,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1382,
 /**/
     1381,
 /**/