[librsvg: 7/95] Sigh, pass C strings properly

[Federico Mena Quintero <federico src gnome org>]

commit db897db4e5f5535dc17f0a37f0ba48ab025d092a
Author: Federico Mena Quintero <federico gnome org>
Date:   Thu Feb 8 07:07:44 2018 -0600

    Sigh, pass C strings properly

 rust/src/attributes.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/rust/src/attributes.rs b/rust/src/attributes.rs
index 2aed14c6..02630a8a 100644
--- a/rust/src/attributes.rs
+++ b/rust/src/attributes.rs
@@ -52,7 +52,7 @@ mod tests {
     #[test]
     fn c_attribute_from_name() {
         let mut a: Attribute = unsafe { mem::uninitialized() };
-        let res: bool = from_glib(rsvg_attribute_from_name("width".as_ptr() as *const libc::c_char,
+        let res: bool = from_glib(rsvg_attribute_from_name("width".to_glib_none().0,
                                                            &mut a as *mut Attribute));
         assert!(res);
         assert_eq!(a, Attribute::Width);
@@ -61,7 +61,7 @@ mod tests {
     #[test]
     fn invalid_c_attribute_from_name() {
         let mut a: Attribute = unsafe { mem::uninitialized() };
-        let res: bool = from_glib(rsvg_attribute_from_name("foobar".as_ptr() as *const libc::c_char,
+        let res: bool = from_glib(rsvg_attribute_from_name("foobar".to_glib_none().0,
                                                            &mut a as *mut Attribute));
         assert!(!res);
     }