Fix for issues #220 and #248. Modified the lhp calculation to set lhp to 0 if both term A and B are negative, and also set lhp to be 0 if it is still negative after adding 5, which is consistent with the following from Johnson and Sugden (2014):
Additionally, if Term A and B are
both negative the LHP is set to zero to avoid
creating a positive value by multiplying two
negative terms. Finally, if values are still not
above zero after the previous addition term, all
negative values of the LHP are set to zero.
Fix for issues #220 and #248. Modified the lhp calculation to set lhp to 0 if both term A and B are negative, and also set lhp to be 0 if it is still negative after adding 5, which is consistent with the following from Johnson and Sugden (2014):