fix #163

Author: duwen

lib/src/dio.dart

@@ -43,7 +43,7 @@ class Dio {
   }
 
   /// The Dio version.
-  static const version = "0.0.4";
+  static const version = "1.0.16";
 
   /// Default Request config. More see [Options] .
   Options options;

lib/src/form_data.dart

@@ -94,9 +94,6 @@ class FormData extends MapMixin<String, dynamic> {
     });
     if (_map.length > 0 || fileMap.length > 0) {
       data.clear();
-      if(fileMap.length>0) {
-        _writeln(data);
-      }
       data.write(boundary+"--");
       _writeln(data);
       //_writeln(data);
@@ -140,4 +137,4 @@ class FormData extends MapMixin<String, dynamic> {
     bytes.addAll(utf8.encode('\r\n'));
     data.clear();
   }
-}
+}

pubspec.yaml

@@ -1,6 +1,6 @@
 name: dio
 description: A powerful Http client for Dart, which supports Interceptors, FormData, Request Cancellation, File Downloading, Timeout etc.
-version: 1.0.15
+version: 1.0.16
 homepage: https://github.com/flutterchina/dio
 author: wendux <824783146@qq.com>