dt_masks_legacy_params: protect against potential (impossible) "Dereference after null check"

Coverity CID 1227578
dt_dev_read_history(): cleanup handling of "orientation (off)" history element
temperature iop: process(): cleanup Bayer part
temperature iop: process(): cleanup X-Trans part
iop invert: process(): some generic cleanup
iop invert: process(): cleanup Bayer part
iop invert: process(): cleanup X-Trans part
Temperature iop: process(): (non-mosaiced): SSE
Invert iop: process(): (non-mosaiced): SSE
Invert iop: process(): (Bayer): SSE
Fix segfault when XDG_CURRENT_DESKTOP is not set
Run iop_dependencies.py
Invert iop: process(): (Bayer): forgot clamping
rawspeed: implement RawImageData::getDataUncropped()
Bauhaus: add dt_bauhaus_slider_set_boundaries
Histogram: replace dt_iop_roi_t with new dt_histogram_roi_t
Needed preparations for loading of uncropped, unscaled (B/W) raw images
dt_imageio_open_rawspeed(): break everything! Stop cropping.
rawprepare: new IOP, no-op (passthrough)
rawprepare: allow tiling

FIXME: verify this!