/// <summary>
/// Get the debug signature for a local.
/// </summary>
/// <param name="loc">The local.</param>
/// <returns>The signature.</returns>
internal DebugLocalSig GetDebugSig(Local loc)
{
byte[] b = loc.GetSig();
string s = BitConverter.ToString(b);
DebugLocalSig sig = (DebugLocalSig)debugsigs[s];
if (sig != null) return sig;
sig = new DebugLocalSig(b);
debugsigs.Add(s, sig);
return sig;
}