5f7f6b65f3
This commit fixes two different issues in `BLO_update_defaults_startup_blend`: * No check were done whether a given 'paint mode' tool settings actually exist or not before trying to 'update' it, leading to hard crash when some did not. * Only the first Scene in loaded 'startup' Main would be processed - nothing prevents a `startup.blend` file to have more than one scene!