Our Shiner Platter lunch at Lockhart Smokehouse. Yes, it was a good as it looks. (Photo ©Chris Wilkins) During an anything-but-light lunch Thursday at Lockhart Smokehouse in Dallas, owner Jeff Bergus said business has been so strong — up more than 25 percent this year — that he’s thinking of adding a second pit to the big Bewley that the joint has used since opening in early 2011. Where would it go? Bergus said he wasn’t sure, but pointed out that there is a small, vacant storefront adjacent to the back of his place, which would be one possibility. Lockhart…