Fix bug with defaulting for valid false values
Fix bug with defaulting for valid false values

For example, a stack of "0" would be incorrectly defaulted to null

maier/nad,sean-/nad,sean-/nad,esproul/nad,keithf4/nad,hjhart/nad,esproul/nad,circonus-labs/nad,hjhart/nad,hjhart/nad,keithf4/nad,hjhart/nad,HeinrichHartmann/nad,maier/nad,maier/nad,circonus-labs/nad,keithf4/nad,circonus-labs/nad,sean-/nad,circonus-labs/nad,maier/nad,maier/nad,hjhart/nad,HeinrichHartmann/nad,keithf4/nad,HeinrichHartmann/nad,circonus-labs/nad,circonus-labs/nad,HeinrichHartmann/nad,esproul/nad,esproul/nad,esproul/nad,HeinrichHartmann/nad,sean-/nad,keithf4/nad,HeinrichHartmann/nad,maier/nad,sean-/nad