-print "\nxbt_error_t test_structures(gras_socket_t *sock, int direction);\n";
-print "\nxbt_error_t test_structures(gras_socket_t *sock, int direction) {\n";
-print " xbt_error_t errcode;\n";
+print "void test_structures(gras_socket_t *sock, int direction);\n";
+print "void test_structures(gras_socket_t *sock, int direction) {\n";