Index: libs/ardour/playlist.cc
===================================================================
--- libs/ardour/playlist.cc     (revision 7233)
+++ libs/ardour/playlist.cc     (working copy)
@@ -2392,7 +2392,7 @@
        int const divisions = 512;

        /* find the start and end positions of the regions on this playlist */
-       framepos_t start = UINT_MAX;
+       framepos_t start = INT64_MAX;
        framepos_t end = 0;
        for (RegionList::const_iterator i = regions.begin(); i != regions.end(); ++i) {
                start = min (start, (*i)->position());