NEW YORK/SAN FRANCISCO (Reuters) – Clearwire Corp is “actively taking into consideration” defaulting on a $255 million pastime cost due June 1 on about $4.5 billion of exceptional debt, in line with a proxy submitting on Friday, as a shareholder vote methods on Dash-Nextel Corp’s takeover provide. The corporate, which advised traders to vote in want of Dash’s buyout offer, warned that failure to shut a deal may pressure it to contemplate a monetary restructuring, which in turn may entail filing for chapter. …