Fix MAX define on Linux.
Fix MAX define on Linux.

darktable-org/rawspeed,LebedevRI/rawspeed,darktable-org/rawspeed,anarsoul/rawspeed,darktable-org/rawspeed,mgehre/rawspeed,darktable-org/rawspeed,klauspost/rawspeed,LebedevRI/rawspeed,mgehre/rawspeed,LebedevRI/rawspeed,LebedevRI/rawspeed,darktable-org/rawspeed,klauspost/rawspeed,anarsoul/rawspeed,anarsoul/rawspeed,LebedevRI/rawspeed