Fix offset of imports.

Audio_Track.C

@@ -87,8 +87,7 @@ Audio_Track::handle ( int m )
                 return 0;
             }
 
-            // FIXME: account for width of track header.
-            Region *r = new Region( c, this, timeline->xoffset + timeline->x_to_ts( Fl::event_x() ) );
+            Region *r = new Region( c, this, timeline->xoffset + timeline->x_to_ts( Fl::event_x() - x() ) );
 
             redraw();
             return 1;