Minor renaming diff -> state_diff

ethcore/src/client/client.rs

@@ -464,9 +464,9 @@ impl<V> BlockChainClient for Client<V> where V: Verifier {
 		let options = TransactOptions { tracing: false, vm_tracing: analytics.vm_tracing, check_nonce: false };
 		let mut ret = Executive::new(&mut state, &env_info, self.engine.deref().deref(), &self.vm_factory).transact(t, options);
 		// TODO gav move this into Executive.
-		if analytics.diffing {
+		if analytics.state_diffing {
 			if let Ok(ref mut x) = ret {
-				x.diff = Some(state.diff_from(self.state()));
+				x.state_diff = Some(state.diff_from(self.state()));
 			}
 		}
 		ret

ethcore/src/client/mod.rs

@@ -55,7 +55,7 @@ pub struct CallAnalytics {
 	/// Make a VM trace.
 	pub vm_tracing: bool,
 	/// Make a diff.
-	pub diffing: bool,
+	pub state_diffing: bool,
 }
 
 /// Blockchain database client. Owns and manages a blockchain and a block queue.