Revert "Remove erroneous free().", this code no more compiles

This reverts commit 3d2e9fe5ae381583befd5c43b1b7a76b7d1d3ec9.
Remove erroneous free().

The address operator is wrong and the memory actually meant
to be freed has already been freed by ifoFree_PGC() anyway.

git-svn-id: svn://svn.mplayerhq.hu/dvdnav/trunk/libdvdread@1250 625a9de0-492d-0410-920c-a7e632af1907
Merge pull request #2 from hilbix/tino

Tino