Don't fix bug when no money is involved.

lib/src/commands.rs

@@ -235,7 +235,7 @@ impl Command for EncryptCommand {
         use crate::lightwallet::bugs::BugBip39Derivation;
         if BugBip39Derivation::has_bug(lightclient) {
             let mut h = vec![];
-            h.push("It looks like your wallet has the bop39bug. Please run 'fixbip39bug' to fix it");
+            h.push("It looks like your wallet has the bip39bug. Please run 'fixbip39bug' to fix it");
             h.push("before encrypting your wallet.");
             h.push("ERROR: Cannot encrypt while wallet has the bip39bug.");
             return h.join("\n");

lib/src/lightwallet/bugs.rs

@@ -73,13 +73,12 @@ impl BugBip39Derivation {
         println!("Sending funds to ourself.");
         let zaddr = client.do_address()["z_addresses"][0].as_str().unwrap().to_string();
         let balance_json = client.do_balance();
-        let fee: u64 = DEFAULT_FEE.try_into().unwrap();
         let amount: u64 =  balance_json["zbalance"].as_u64().unwrap() 
-                         + balance_json["tbalance"].as_u64().unwrap()
-                         - fee;
+                         + balance_json["tbalance"].as_u64().unwrap();
 
         let txid = if amount > 0 {
-            match client.do_send(vec![(&zaddr, amount, None)]) {
+            let fee: u64 = DEFAULT_FEE.try_into().unwrap();
+            match client.do_send(vec![(&zaddr, amount-fee, None)]) {
                 Ok(txid) => txid,
                 Err(e) => {
                     let r = object!{