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().
diff --git a/src/ui.c b/src/ui.c
index 5ae0ae3..d341448 100644
--- a/src/ui.c
+++ b/src/ui.c
@@ -154,8 +154,7 @@
 	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
diff --git a/src/version.c b/src/version.c
index 3207af3..3d4fa68 100644
--- a/src/version.c
+++ b/src/version.c
@@ -793,6 +793,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    548,
+/**/
     547,
 /**/
     546,