Blender Git Loki

SculptMode fix:

DNA definition of Sculpt structs in Scene were not properly aligned,
causing memory errors on quit ("Memoryblock reconstruct: end corrupt").

More testing reveiled padding errors in two other DNA_ includes, for
sound and gamelogic. Both potentially crashers... and caused by
commenting out struct members with a C++ comment, that seems to not
work...

I've revived the DNA padding test method, which saves out a simple C
file you can compile to see where padding issues are. This now works
as follows:

- change line 991 in makesdna.c to become (1) (true).
- recompile makesdna.c
- you now have a padding.c in the same dir as makesdna.c
- compile it, command line: "gcc -o padding padding.c"
- now run it (./padding), and it will print out errors, if there are.

For me, the DNA files are now 100% padding free. Might be interesting to
check it in 64 bits though!