Portability fix (accidently left out from last changeset)

sql/sql_insert.cc

@@ -25,7 +25,7 @@ static TABLE *delayed_get_table(THD *thd,TABLE_LIST *table_list);
 static int write_delayed(THD *thd,TABLE *table, enum_duplicates dup,
 			 char *query, uint query_length, bool log_on);
 static void end_delayed_insert(THD *thd);
-extern "C" static pthread_handler_decl(handle_delayed_insert,arg);
+extern "C" pthread_handler_decl(handle_delayed_insert,arg);
 static void unlink_blobs(register TABLE *table);
 
 /* Define to force use of my_malloc() if the allocated memory block is big */