The world's largest coffee chain hopes customers making and sipping coffee at home will brew up big earnings. Starbucks (SBUX) reports fiscal second-quarter results Thursday afternoon. Analysts think earnings climbed 15% to 39 cents in the January-March quarter. Their forecasts call for revenue of $3.18 billion, up 14.3%. The chain dominates in the away-from-home coffee market, with more than 17,000 stores in 55 countries. Now it's staking a