Don't perform any string operations on the variable when we assume it's the decimal...

Don't perform any string operations on the variable when we assume it's the decimal value.

Just cast it outright, don't trim() or replace the ordinal indicators if present, the
cast operation will do that for us, and as a bonus, won't corrupt the value if it's in
a locale that doesn't use a decimal point for a decimal seperator.

Bug: 9180