Western Digital shares were falling Friday afternoon, after the world’s largest hard-disk-drive maker lowered guidance for its fiscal first-quarter. However, we think its shareholder friendly policies and a still strong outlook for 2013 should propel shares higher. Late Thursday, Western Digital Corp. (ticker: WDC) cut its first-quarter revenue forecast, while also initiating a quarterly dividend of 25 cents a share and boosting its share buyback authorization by $1.5 billion. It now expects first-quarter revenue of $3.9 billion to $4 billion, down from a previous estimate of $4.2 billion to $4.3 billion, as market demand was lower than anticipated. Western Digital …