13.2 End points and reachability: variable declaration reachability

It looks like we are missing _variable declaration_ exception from a list of specially handled statements in 14.2.

Consider

``` csharp
static class Program
{
static void Main(string[] args)
{
goto L;
int v; // CSC reports a warning Unreachable code detected here
L:
v = 1;
}
}
```

Proposal:

Add a new text block to section 14.2, possibly before "The block of a function member is always considered reachable"

> The local variable declaration and local constant declaration are always considered reachable.