(read_minibuf): Use empty_unibyte_string.

diff --git a/src/minibuf.c b/src/minibuf.c
index db069aaf29e4143fabe645fd83d3a626c56c2329..94e06365a917d9bd1641fc0a6ea560ebdce0b395 100644 (file)
--- a/src/minibuf.c
+++ b/src/minibuf.c
@@ -529,7 +529,7 @@ read_minibuf (map, initial, prompt, backup_n, expflag,
   GCPRO5 (map, initial, val, ambient_dir, input_method);
 
   if (!STRINGP (prompt))
-    prompt = empty_string;
+    prompt = empty_unibyte_string;
 
   if (!enable_recursive_minibuffers
       && minibuf_level > 0)