MOSDecoder: fix strict aliasing warning due to *(float*)(&int) cast
MOSDecoder: fix strict aliasing warning due to *(float*)(&int) cast

use new loadMem<float>().

darktable-org/rawspeed,LebedevRI/rawspeed,darktable-org/rawspeed,darktable-org/rawspeed,LebedevRI/rawspeed,darktable-org/rawspeed,LebedevRI/rawspeed,LebedevRI/rawspeed,LebedevRI/rawspeed,darktable-org/rawspeed