bugfix total region read counts were not being computed correctly
bugfix total region read counts were not being computed correctly

PrincetonUniversity/WASP,cdeboever3/WASP,gmcvicker/WASP,bmvdgeijn/WASP,smozaffari/WASP,TheFraserLab/Hornet,bmvdgeijn/WASP,cdeboever3/WASP,gmcvicker/WASP,gmcvicker/WASP,smozaffari/WASP,bmvdgeijn/WASP,smozaffari/WASP,cdeboever3/WASP,smozaffari/WASP,PrincetonUniversity/WASP,gmcvicker/CHT,gmcvicker/CHT,bmvdgeijn/WASP,cdeboever3/WASP,smozaffari/WASP,gmcvicker/WASP