fix: release test

Author: liamaharon

src/ecdsa/mod.rs

@@ -299,7 +299,7 @@ impl<C: Signing> Secp256k1<C> {
         let mut entropy_p: *const ffi::types::c_void = ptr::null();
         let mut counter: u32 = 0;
         let mut extra_entropy = [0u8; 32];
-        let msg_c_ptr = msg.into().as_c_ptr();
+        let msg = msg.into();
         loop {
             unsafe {
                 let mut ret = ffi::Signature::new();
@@ -309,7 +309,7 @@ impl<C: Signing> Secp256k1<C> {
                     ffi::secp256k1_ecdsa_sign(
                         self.ctx.as_ptr(),
                         &mut ret,
-                        msg_c_ptr,
+                        msg.as_c_ptr(),
                         sk.as_c_ptr(),
                         ffi::secp256k1_nonce_function_rfc6979,
                         entropy_p