Fixed break in Rust bindings where callback registering expected a
*const i8, but were provided with a *const c_char. Changed to be both
*const c_char in alignment with the libguestfs documentation.

Signed-off-by: Jacob Reger <regerjacob@gmail.com>
---
 rust/src/event.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/rust/src/event.rs b/rust/src/event.rs
index 72afd3cf6..156968a69 100644
--- a/rust/src/event.rs
+++ b/rust/src/event.rs
@@ -29,7 +29,7 @@ type GuestfsEventCallback = extern "C" fn(
     u64,
     i32,
     i32,
-    *const i8,
+    *const c_char,
     usize,
     *const u64,
     usize,
--
2.39.5 (Apple Git-154)