wallet2: fix illegal memory access removing newlines from password

src/wallet/wallet2.cpp

@@ -191,7 +191,7 @@ boost::optional<tools::password_container> get_password(const boost::program_opt
     }
 
     // Remove line breaks the user might have inserted
-    password.erase(std::remove(password.begin() - 1, password.end(), '\n'), password.end());
+    password.erase(std::remove(password.end() - 1, password.end(), '\n'), password.end());
     password.erase(std::remove(password.end() - 1, password.end(), '\r'), password.end());
     return {tools::password_container(std::move(password))};
   }