Blender Git Loki

BUGFIX: revision 25736 (about 3 hours ago) introduced a problem in SDNA
for drivers, which will cause files that include drivers and saved since
then to crash on load, and loading existing files to crash as well. This
commit fixes that problem. So, don't use builds from revision 25736-25743.

The problem is this line, SDNA does not support parsing #defines:

DriverTarget targets[MAX_DRIVER_TARGETS];