Fixed small function

src/quantity/scalar/scalar.rs

@@ -184,7 +184,7 @@ impl Scalar {
 
 	pub fn is_nan(&self) -> bool {
 		match self {
-			Scalar::Float {..} => {false},
+			Scalar::Float{ v } => {v.val.is_nan()},
 			Scalar::Rational {..} => {false}
 		}
 	}