row0mysql.c, row0mysql.h:

  Backport of bug fix in 4.0: do not x-lock rows under LOCK TABLES READ unless the table is a temp table

innobase/include/row0mysql.h

@@ -393,6 +393,7 @@ struct row_prebuilt_struct {
 					an SQL statement: we may have to set
 					an intention lock on the table,
 					create a consistent read view etc. */
+        ibool           mysql_has_locked;
 	ibool		clust_index_was_generated;
 					/* if the user did not define a
 					primary key in MySQL, then Innobase

innobase/row/row0mysql.c

@@ -320,6 +320,7 @@ row_create_prebuilt(
 	prebuilt->trx = NULL;
 
 	prebuilt->sql_stat_start = TRUE;
+	prebuilt->mysql_has_locked = FALSE;
 
 	prebuilt->index = NULL;
 	prebuilt->n_template = 0;