struct dt_mipmap_buffer_dsc: use __attribute__((packed,aligned(16))) for padding
Type size_е may have different size on 32-bit machines, so let's try to make compiler do the padding.
[l10n] Swedish update
dt_imageio_open_rawspeed_sraw(): clamp at 0.0f after scaling
fix a warning on OS X (defined but unused)
fix another warning on OS X:

gint64 is long int here, not long long int like int64_t