Removed trailing spaces in the most relevant files

Command used for the job:
egrep -rl ' $' --include *.c --include *.h --include  *.s --include  *.inc --include  *.txt *  | xargs sed -i 's/\s\+$//g'

Credits to Grant Murphy from Stack Overflow.

src/field_weather.c

@@ -110,8 +110,8 @@ void (*const gWeatherPalStateFuncs[])(void) =
 {
     [WEATHER_PAL_STATE_CHANGING_WEATHER]  = UpdateWeatherGammaShift,
     [WEATHER_PAL_STATE_SCREEN_FADING_IN]  = FadeInScreenWithWeather,
-    [WEATHER_PAL_STATE_SCREEN_FADING_OUT] = DoNothing,               
-    [WEATHER_PAL_STATE_IDLE]              = DoNothing,             
+    [WEATHER_PAL_STATE_SCREEN_FADING_OUT] = DoNothing,
+    [WEATHER_PAL_STATE_IDLE]              = DoNothing,
 };
 
 // This table specifies which of the gamma shift tables should be