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_cmds.c b/src/ex_cmds.c
index 6ec3ded..61c85a9 100644
--- a/src/ex_cmds.c
+++ b/src/ex_cmds.c
@@ -3561,7 +3561,7 @@
 
     if (other)
 	++no_wait_return;	    /* don't wait for autowrite message */
-    if (other && !forceit && curbuf->b_nwindows == 1 && !P_HID(curbuf)
+    if (other && !forceit && curbuf->b_nwindows == 1 && !buf_hide(curbuf)
 		   && curbufIsChanged() && autowrite(curbuf, forceit) == FAIL)
     {
 #if defined(FEAT_GUI_DIALOG) || defined(FEAT_CON_DIALOG)
@@ -3590,7 +3590,7 @@
 	retval = GETFILE_SAME_FILE;	/* it's in the same file */
     }
     else if (do_ecmd(fnum, ffname, sfname, NULL, lnum,
-		(P_HID(curbuf) ? ECMD_HIDE : 0) + (forceit ? ECMD_FORCEIT : 0),
+	     (buf_hide(curbuf) ? ECMD_HIDE : 0) + (forceit ? ECMD_FORCEIT : 0),
 		curwin) == OK)
 	retval = GETFILE_OPEN_OTHER;	/* opened another file */
     else
@@ -8401,7 +8401,7 @@
 	 * Skip the check if the 'hidden' option is set, as in this case the
 	 * buffer won't be lost.
 	 */
-	if (!P_HID(curbuf))
+	if (!buf_hide(curbuf))
 	{
 # ifdef FEAT_WINDOWS
 	    ++emsg_off;