[librsvg/rustify-rsvg-convert] rsvg-convert: fix export_id_option_error test case

[Paolo Borelli <pborelli src gnome org>]

commit 596d98b7ed2ff322c286ce5321550063706bb360
Author: Paolo Borelli <pborelli gnome org>
Date:   Sat Jan 9 09:59:40 2021 +0100

    rsvg-convert: fix export_id_option_error test case

 src/bin/rsvg-convert/main.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/bin/rsvg-convert/main.rs b/src/bin/rsvg-convert/main.rs
index 8eac3e16..e0719080 100644
--- a/src/bin/rsvg-convert/main.rs
+++ b/src/bin/rsvg-convert/main.rs
@@ -117,7 +117,7 @@ fn main() {
             surface
                 .render(&renderer, &cr, args.export_id())
                 .unwrap_or_else(|e| match e {
-                    RenderingError::InvalidId(_) => exit!(
+                    RenderingError::IdNotFound => exit!(
                         "File {} does not have an object with id \"{}\")",
                         input,
                         args.export_id().unwrap()