[core] Check for NaNs in mbgl::util::{min,max,clamp}

src/mbgl/annotation/point_annotation_impl.cpp

@@ -13,7 +13,7 @@ void PointAnnotationImpl::updateLayer(const TileID& tileID, AnnotationTileLayer&
     featureProperties.emplace("sprite", point.icon.empty() ? std::string("default_marker") : point.icon);
 
     mbgl::ScreenCoordinate projected = point.position.project();
-    projected *= 1 << tileID.z;
+    projected *= std::pow(2, tileID.z);
     projected.x = std::fmod(projected.x, 1);
     projected.y = std::fmod(projected.y, 1);
     projected *= GeometryTileFeature::defaultExtent;