Alberto-Culver Co. said that it is reviewing a profit warning from Regis Corp., the hair salon operator in which it intends to buy a majority stake. Alberto-Culver announced that it would sell its retail operations to Regis in a $2.2 billion stock deal. However, the transaction would leave Alberto-Culver shareholders with a 54.5% stake in Regis. Regis, which runs Supercuts and Vidal Sassoon, told Wall Street its fiscal-year profit would fall short of already lowered projections due to...