"like" did not work in some cases with character set big5

mysql-test/include/have_big5.inc

+-- require r/have_big5.require
+disable_query_log;
+show collation like "big5_chinese_ci";
+enable_query_log;

mysql-test/r/ctype_big5.result

+drop table if exists t1;
+SET NAMES big5;
+CREATE TABLE t1 (c CHAR(10) CHARACTER SET big5, KEY(c));
+INSERT INTO t1 VALUES ('aaa'),('aaaa'),('aaaaa');
+SELECT * FROM t1 WHERE c LIKE 'aaa%';
+c
+aaa
+aaaa
+aaaaa
+DROP TABLE t1;

mysql-test/r/have_big5.require

+Collation	Charset	Id	Default	Compiled	Sortlen
+big5_chinese_ci	big5	1	Yes	Yes	1

mysql-test/t/ctype_big5.test

+-- source include/have_big5.inc
+
+#
+# Tests with the big5 character set
+#
+--disable_warnings
+drop table if exists t1;
+--enable_warnings
+
+SET NAMES big5;
+
+#
+# Bug 1883: LIKE did not work in some cases with a key.
+#
+CREATE TABLE t1 (c CHAR(10) CHARACTER SET big5, KEY(c));
+INSERT INTO t1 VALUES ('aaa'),('aaaa'),('aaaaa');
+SELECT * FROM t1 WHERE c LIKE 'aaa%';
+DROP TABLE t1;

strings/ctype-big5.c

@@ -377,7 +377,7 @@ static my_bool my_like_range_big5(CHARSET_INFO *cs __attribute__((unused)),
       *min_length= (uint) (min_str-min_org);
       *max_length= res_length;
       do {
-	*min_str++ = '\0';		/* Because if key compression */
+	*min_str++ = ' ';		/* Because if key compression */
 	*max_str++ = max_sort_char;
       } while (min_str != min_end);
       return 0;