made it possible to set index in strings

Rev: lib/modules/Yabu.pmod/test.pike:1.3

lib/modules/Yabu.pmod/test.pike

@@ -64,6 +64,5 @@ int main(int argc, array argv)
   // Remove test database.
   db->purge();
 
-  write("Yabu test program says everything is A OK.\n");
-  return 1;
+  return 0;
 }