weather: Add function for converting to units

Handles rounding correctly.

Author: FintasticMan

src/components/ble/SimpleWeatherService.h

@@ -112,6 +112,10 @@ namespace Pinetime {
         return celsius * 9 / 5 + 3200;
       }
 
+      static int16_t TempToUnits(int16_t temp) {
+        return temp = temp / 100 + (temp % 100 >= 50 ? 1 : 0);
+      }
+
     private:
       // 00050000-78fc-48fe-8e23-433b3a1942d0
       static constexpr ble_uuid128_t BaseUuid() {

src/displayapp/screens/WatchFaceDigital.cpp

@@ -180,7 +180,7 @@ void WatchFaceDigital::Refresh() {
         temp = Controllers::SimpleWeatherService::CelsiusToFahrenheit(temp);
         tempUnit = 'F';
       }
-      temp = temp / 100 + (temp % 100 >= 50 ? 1 : 0);
+      temp = Controllers::SimpleWeatherService::TempToUnits(temp);
       lv_label_set_text_fmt(temperature, "%d°%c", temp, tempUnit);
       lv_label_set_text(weatherIcon, Symbols::GetSymbol(optCurrentWeather->iconId));
     } else {

src/displayapp/screens/WatchFacePineTimeStyle.cpp

@@ -547,7 +547,7 @@ void WatchFacePineTimeStyle::Refresh() {
       if (settingsController.GetWeatherFormat() == Controllers::Settings::WeatherFormat::Imperial) {
         temp = Controllers::SimpleWeatherService::CelsiusToFahrenheit(temp);
       }
-      temp = temp / 100 + (temp % 100 >= 50 ? 1 : 0);
+      temp = Controllers::SimpleWeatherService::TempToUnits(temp);
       lv_label_set_text_fmt(temperature, "%d°", temp);
       lv_label_set_text(weatherIcon, Symbols::GetSymbol(optCurrentWeather->iconId));
     } else {