Fix Innodb ASAN error on init

Backport 7c03edf2 from xtradb to innodb

storage/innobase/buf/buf0dump.cc

@@ -604,6 +604,7 @@ buf_load()
 
 	if (dump_n == 0) {
 		ut_free(dump);
+		ut_free(dump_tmp);
 		ut_sprintf_timestamp(now);
 		buf_load_status(STATUS_NOTICE,
 				"Buffer pool(s) load completed at %s "

storage/innobase/dict/dict0mem.cc

@@ -319,8 +319,8 @@ dict_mem_table_col_rename_low(
 	ut_ad(from_len <= NAME_LEN);
 	ut_ad(to_len <= NAME_LEN);
 
-	char from[NAME_LEN];
-	strncpy(from, s, NAME_LEN);
+	char from[NAME_LEN + 1];
+	strncpy(from, s, NAME_LEN + 1);
 
 	if (from_len == to_len) {
 		/* The easy case: simply replace the column name in

storage/innobase/handler/ha_innodb.cc

@@ -2781,13 +2781,13 @@ innobase_convert_identifier(
 	ibool		file_id)/*!< in: TRUE=id is a table or database name;
 				FALSE=id is an UTF-8 string */
 {
+	char nz2[MAX_TABLE_NAME_LEN + 1];
 	const char*	s	= id;
 	int		q;
 
 	if (file_id) {
 
 		char nz[MAX_TABLE_NAME_LEN + 1];
-		char nz2[MAX_TABLE_NAME_LEN + 1];
 
 		/* Decode the table name.  The MySQL function expects
 		a NUL-terminated string.  The input and output strings