[librsvg/librsvg-2.44] marker.rs: Log when a referenced marker is not found

[Federico Mena Quintero <federico src gnome org>]

commit e8494e1138aa7cc45b6a970ff417863a28bd3939
Author: Federico Mena Quintero <federico gnome org>
Date:   Wed Oct 24 11:35:45 2018 -0500

    marker.rs: Log when a referenced marker is not found

 rsvg_internals/src/marker.rs | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/rsvg_internals/src/marker.rs b/rsvg_internals/src/marker.rs
index 442617a9..ddc4624e 100644
--- a/rsvg_internals/src/marker.rs
+++ b/rsvg_internals/src/marker.rs
@@ -656,6 +656,7 @@ fn emit_marker_by_name(
             )
         })
     } else {
+        rsvg_log!("marker \"{}\" not found", name);
         Ok(())
     }
 }