patch for possible memory leak

Theres a little memory leak, patch attached, the problem is...

1625 char * m = morph(word);

At conditional (1): "m == 0" taking false path

1626 if(!m) return 0;

Event leaked_storage: Returned without freeing storage "m"
Event pass_arg: Variable "m" not freed or pointed-to in function "line_tok(const char *, char ***)" [model]
Also see events: [alloc_fn][var_assign][pass_arg]
At conditional (2): "out == 0" taking true path

1627 if (!out) return line_tok(m, out);