hg_delta_editor: fix parent revision detection on branch copy Project items copyfrom revisions are irrelevant to parent revision detection, only the project one or those of its ancestors matter. Items copyfrom is useful when retrieving items content. Former code resulted in incorrect converted graph for pyglet repository, especially on the following revision: ------------------------------------------------------------------------ r274 | r1chardj0n3s | 2006-12-21 02:02:14 +0100 (Jeu, 21 Dec 2006) | 2 lines Changed paths: A /branches/richard-glx-version (from /trunk:269) M /branches/richard-glx-version/pyglet/window/xlib/__init__.py R /branches/richard-glx-version/tests/test.py (from /trunk/tests/test.py:270) R /branches/richard-glx-version/tools/info.py (from /trunk/tools/info.py:272) R /branches/richard-glx-version/website/get_involved.php (from /trunk/website/get_involved.php:273) Branching to horribly mangle GLX