Toshiba Corp. is getting a boost in the stock market as the electronics giant weighs whether to file bankruptcy for its Cranberry Township subsidiary, Westinghouse Electric Co., and as Westinghouse clients prepare for potential court action. Westinghouse and Toshiba have been reeling ever since word emerged of a $6 billion writedown at the nuclear company, which led to the resignation of a top executive at Toshiba and Toshiba's consideration of a bankruptcy filing for Westinghouse.