Greenwire: Prospects of a House subcommittee markup next week on a major energy and global warming bill appear dim as the panel’s Democratic leaders head into the weekend without a clear signal that they have enough votes to move the legislation. “I think it’s a real open question, don’t you?” Rep. Jim Matheson (D-Utah) told reporters yesterday when asked about Democrats’ plans to mark up a bill in the House Energy and Environment Subcommittee. Democrats have been in closed-door talks all …