if(compare(i, t->key)==0) {
/* There already exists a node in the tree with the very same key. Build
a linked list of nodes. We make the new 'node' struct the new master
if(compare(i, t->key)==0) {
/* There already exists a node in the tree with the very same key. Build
a linked list of nodes. We make the new 'node' struct the new master