Fixed return values of several functions (e.g. return FALSE for pointer types).

src/libstrongswan/plugins/pgp/pgp_builder.c

@@ -152,7 +152,7 @@ static private_key_t *parse_private_key(chunk_t blob)
 	}
 	if (!pgp_read_scalar(&packet, 1, &version))
 	{
-		return FALSE;
+		return NULL;
 	}
 	switch (version)
 	{
@@ -166,7 +166,7 @@ static private_key_t *parse_private_key(chunk_t blob)
 			break;
 		default:
 			DBG1(DBG_LIB, "PGP packet version V%d not supported", version);
-			return FALSE;
+			return NULL;
 	}
 	if (!pgp_read_scalar(&packet, 4, &created))
 	{

src/libstrongswan/plugins/pgp/pgp_cert.c

@@ -441,14 +441,14 @@ pgp_cert_t *pgp_cert_load(certificate_type_t type, va_list args)
 				if (!parse_signature(this, packet))
 				{
 					destroy(this);
-					return FALSE;
+					return NULL;
 				}
 				break;
 			case PGP_PKT_USER_ID:
 				if (!parse_user_id(this, packet))
 				{
 					destroy(this);
-					return FALSE;
+					return NULL;
 				}
 				break;
 			default: