MINYANVILLE ORIGINAL Fiscal cliff negotiations have investors on edge but an upwardly revised final reading of the US economy's growth could boost stocks today. Before the opening bell Dow (INDEXDJX:.DJI) futures were dead flat at 13 219. Futures contracts on the S&P 500 (INDEXSP:.INX) inched up by  0.01% to 1 433.10 and Nasdaq (INDEXNASDAQ:.IXIC) futures climbed 0.11% to 2 695.75. House Speaker John Boehner will call a vote for the Republican "Plan B" tax bill. The GOP plan will only raise taxes on those earning more than $1 million per year. President Barack Obama has promised to veto the ...