COLUMBIA, S.C. — South Carolina Gov. Henry McMaster says his office is reviewing policies and ideas that could help curb gun violence in the wake of multiple mass shootings that includes last week’s Texas school shooting that left 19 children and two adults dead. But he stopped short Wednesday of detailing specifically what policies his office is looking at and whether he’d back more restrictive gun measures as some Democratic lawmakers have called on him to do. “We’re studying and getting ideas from other states to see what, if anything, we can and should do, (and) what would be good for Sout…