sspi: fix typo (#324)

It is not really an issue, but a semi-colon was expected there, not a
comma.

Signed-off-by: Matthieu Baerts (NGI0) <[email protected]>

Author: matttbe

plugins/path_managers/sspi.c

@@ -609,7 +609,7 @@ static void sspi_connection_established(mptcpd_token_t token,
         (void) token;
         (void) laddr;
         (void) raddr;
-        (void) server_side,
+        (void) server_side;
         (void) pm;
 
         /**