Blender Git Loki

Bugfix [#22069] Speed-Ipos are not imported correctly from 2.49 to 2.5

- IPO-blocks for curves were not getting handled correctly (i.e. no conversion and relinking was taking place) when converting from 2.4x to 2.5
- Old 'speed' IPO's now have their values multiplied by the path length when they are loaded from old 2.4x files so that they work correctly in 2.5.

Also...
- Cleaned up a few instances of scruffy code formatted in some weird ad-hoc way.
- Debug prints for the start/end of the file conversion process are now all hidden behind debug-only checks. Unless the way the conversions are done is significantly changed at some point, this should be sufficient...