Fix some math overflows in rgb2hsv_approximate
Fix some math overflows in rgb2hsv_approximate

corbinstreehouse/FastLED,felixLam/FastLED,FastLED/FastLED,remspoor/FastLED,kcouck/FastLED,tullo-x86/FastLED,wilhelmryan/FastLED,remspoor/FastLED,NicoHood/FastLED,PaulStoffregen/FastLED,FastLED/FastLED,neographophobic/FastLED,felixLam/FastLED,corbinstreehouse/FastLED,kcouck/FastLED,FastLED/FastLED,FastLED/FastLED,PaulStoffregen/FastLED,neographophobic/FastLED,tullo-x86/FastLED,eshkrab/FastLED-esp32,PaulStoffregen/FastLED,wilhelmryan/FastLED,NicoHood/FastLED,eshkrab/FastLED-esp32