[msvc] Fix warnings, mainly casting to smaller types (#270)

If the checks by GitHub Actions checks are met, then it seems good to go.  Thanks for supporting FOSS4G!

src/mbgl/annotation/render_annotation_source.cpp

@@ -34,7 +34,7 @@ void RenderAnnotationSource::update(Immutable<style::Source::Impl> baseImpl_,
         needsRelayout,
         parameters,
         *baseImpl,
-        util::tileSize,
+        util::tileSize_I,
         // Zoom level 16 is typically sufficient for annotations.
         // See https://github.com/mapbox/mapbox-gl-native/issues/10197
         {0, 16},