Fix problem where if g_mem_chunk_reset() is called on an alloc-only

Fix problem where if g_mem_chunk_reset() is called on an alloc-only

Fri Mar 22 17:59:27 2002  Owen Taylor  <otaylor@redhat.com>

        * glib/gmem.c (g_mem_chunk_reset): Fix problem where
        if g_mem_chunk_reset() is called on an alloc-only
        memchunk, then a useles GTree was created.