error with lb, ub, and scaling defaults

[tylercritchfield]

Not urgent, but I noticed that if all of the values for lower bound, upper bound, or scaling in the input file are assumed to be default, there's an error about not being able to assign them Float values (-Inf, Inf, or 1.0 respectively). This also happens if not all of them are default and none of the given values are Floats (for instance arrays of Floats). However, if just one variable has a given value that is a float and the rest are default, then it's fine. I didn't look too much into how to fix this but I wanted to make sure I didn't forget about it.