Minor tidy of XObject inline-content() method

lib/PDF/Content/XObject.rakumod

@@ -117,15 +117,14 @@ role PDF::Content::XObject['Image']
     }
 
     method inline-content {
-
         # for serialization to content stream ops: BI dict ID data EI
         use PDF::Content::Ops :OpCode;
         use PDF::COS::Util :ast-coerce;
         # serialize to content ops
-        my %dict = ast-coerce(self).value.list;
-        %dict<Length>:delete;
+        my %xo-dict = ast-coerce(self).value.list;
+        %xo-dict<Length>:delete;
+        my %dict = self.inline-to-xobject(%xo-dict, :invert );
         %dict<L> = $.encoded.codes; # Length is mandatory in PDF 2.0
-        %dict = self.inline-to-xobject( %dict, :invert );
 
         [ (BeginImage) => [ ],
           (ImageData)  => [ :%dict, :$.encoded ],