Bug #38693: leaked memory with blobs!

If delayed insert fails to upgrade the lock it was not
freeing the temporary memory storage used to keep
newly constructed blob values in memory.
Fixed by iterating over the remaining rows in the delayed
insert rowset and freeing the blob storage for each row.

No test suite because it involves concurrent delayed inserts 
on a table and cannot easily be made deterministic. 

Added a correct valgrind suppression for Fedora 9.

mysql-test/valgrind.supp

@@ -319,6 +319,14 @@
    fun:_dl_map_object
 }
 
+{
+   libc pthread_exit 8
+   Memcheck:Leak
+   fun:malloc
+   fun:local_strdup
+   fun:_dl_map_object
+   fun:dl_open_worker
+}
 
 
 #

sql/sql_insert.cc

@@ -2585,6 +2585,11 @@ bool Delayed_insert::handle_inserts(void)
   /* Remove all not used rows */
   while ((row=rows.get()))
   {
+    if (table->s->blob_fields)
+    {
+      memcpy(table->record[0],row->record,table->s->reclength);
+      free_delayed_insert_blobs(table);
+    }
     delete row;
     thread_safe_increment(delayed_insert_errors,&LOCK_delayed_status);
     stacked_inserts--;