Struggling US chip-maker Intel has positively surprised Wall Street with its revenue forecast for the current quarter on Thursday. The company’s shares, which have been badly shaken in recent months, rose by around 10% at times in after-hours US trading. Intel forecast revenues of between $13.3 billion and $14.3 billion for the current quarter. Analysts had expected an average of $13.6 billion. Intel’s revenue fell by 6% year-on-year to $13.3 billion in the last quarter. The company recorded a loss of $16.6 billion in the last quarter due to write-offs and charges related to the ongoing restru…