patch 8.1.0548: crash when job callback unloads a buffer

Problem:    Crash when job callback unloads a buffer. (James McCoy)
Solution:   Don't round up the wait time to 10 msec in ui_inchar().

src/ui.c

@@ -154,8 +154,7 @@ ui_inchar(
 	static int count = 0;
 
 # ifndef NO_CONSOLE
-	retval = mch_inchar(buf, maxlen, (wtime >= 0 && wtime < 10)
-						? 10L : wtime, tb_change_cnt);
+	retval = mch_inchar(buf, maxlen, wtime, tb_change_cnt);
 	if (retval > 0 || typebuf_changed(tb_change_cnt) || wtime >= 0)
 	    goto theend;
 # endif

src/version.c

@@ -792,6 +792,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    548,
 /**/
     547,
 /**/