Two small memory leaks, also noticed by Martin Prikryl.

[originally from svn r3752]

ssh.c

@@ -5198,6 +5198,7 @@ static void do_ssh2_authconn(Ssh ssh, unsigned char *in, int inlen, int ispkt)
 
 		    ssh2_pkt_send(ssh);
 		    s->type = AUTH_TYPE_PUBLICKEY;
+		    key->alg->freekey(key->data);
 		}
 	    } else if (s->method == AUTH_PASSWORD) {
 		/*

sshbn.c

@@ -909,6 +909,7 @@ Bignum modinv(Bignum number, Bignum modulus)
 	x = bigmuladd(q, xp, t);
 	sign = -sign;
 	freebn(t);
+	freebn(q);
     }
 
     freebn(b);