Fix missing minus sign.

The code "worked" -- but it did not have the property that there was no optimal
strategy in order to get the role you want.  We want this role selection to be
random/fair.

src/steamnetworkingsockets/clientlib/steamnetworkingsockets_p2p.cpp

@@ -2055,7 +2055,7 @@ static int CompareSymmetricConnections( uint32 nConnectionIDA, const std::string
 
 	// Check parity of lowest bit and flip result
 	if ( ( nConnectionIDA ^ nConnectionIDB ) & 1 )
-		result = result;
+		result = -result;
 
 	return result;
 }