Reorder for improved clarity

VL1.tex

@@ -501,16 +501,6 @@ data MaybeInt = NoError Int
               | Error String
 \end{lstlisting}
 \pause
-And now we can do sanity checks:
-\pause
-\setHaskellCodeStyle
-\begin{lstlisting}
-calcSomething :: Int -> MaybeInt
-calcSomething x
-  | x < 100   = NoError (x * 5)
-  | otherwise = Error "Int out of range!"
-\end{lstlisting}
-\pause
 So constructors are just \emph{functions}! And they can have arguments, just like functions. Let's check their types:
 \setHaskellCodeStyle
 \begin{lstlisting}
@@ -519,6 +509,15 @@ NoError :: Int -> MaybeInt
 > :t Error
 Error :: String -> MaybeInt
 \end{lstlisting}
+\pause
+And now we can do sanity checks:
+\setHaskellCodeStyle
+\begin{lstlisting}
+calcSomething :: Int -> MaybeInt
+calcSomething x
+  | x < 100   = NoError (x * 5)
+  | otherwise = Error "Int out of range!"
+\end{lstlisting}
 \end{frame}
 
 \begin{frame}[fragile]