mnemonic_list_find
m0 = mnemonic_list_find(&m->child, ch);
m0 = mnemonic_list_find(&m->child, ch);
m0 = mnemonic_list_find(&m->child, ch);
m = mnemonic_list_find(&m->child, psenc->ch[0]);
if (mnemonic_list_find(&m->child, ch) == NULL) {