Remove internal/conv

This sets font rendering back a little bit, but not much.

internal/assetstore/set.go

@@ -14,11 +14,12 @@ var (
 type Set struct {
 	assets *AssetStore
 
-	raw *sets.MapSet
+	raw        *sets.MapSet
+	NumObjects int
 }
 
 func (s *Set) Object(idx int) (*Object, error) {
-	if idx < 0 || idx >= len(s.raw.Palette) {
+	if idx < 0 || idx >= s.NumObjects {
 		return nil, ErrOutOfBounds
 	}
 
@@ -27,6 +28,7 @@ func (s *Set) Object(idx int) (*Object, error) {
 
 func (a *AssetStore) Set(name string) (*Set, error) {
 	name = canonical(name)
+
 	if set, ok := a.sets[name]; ok {
 		return set, nil
 	}
@@ -43,8 +45,9 @@ func (a *AssetStore) Set(name string) (*Set, error) {
 	}
 
 	set := &Set{
-		assets: a,
-		raw:    raw,
+		assets:     a,
+		raw:        raw,
+		NumObjects: len(raw.Palette),
 	}
 	a.sets[name] = set