Change SignTransaction's input_errors to use bilingual_str

src/wallet/test/wallet_tests.cpp

@@ -68,7 +68,7 @@ static CMutableTransaction TestSimpleSpend(const CTransaction& from, uint32_t in
     keystore.AddKey(key);
     std::map<COutPoint, Coin> coins;
     coins[mtx.vin[0].prevout].out = from.vout[index];
-    std::map<int, std::string> input_errors;
+    std::map<int, bilingual_str> input_errors;
     BOOST_CHECK(SignTransaction(mtx, &keystore, coins, SIGHASH_ALL, input_errors));
     return mtx;
 }