improve the code. fix network error

cocos/base/ccUTF8.cpp

@@ -183,8 +183,6 @@ long getCharacterCountInUTF8String(const std::string& utf8)
     return getUTF8StringLength((const UTF8*)utf8.c_str());
 }
 
-
-
 } //namespace StringUtils {
 
 

cocos/network/HttpClient-android.cpp

@@ -585,9 +585,9 @@ private:
         std::string strValue = "";
         if (!cocos2d::StringUtils::getUTFCharsFromJavaEnv(env, jstr, strValue))
         {
-            ret = strdup(strValue.c_str());
+            strValue = "";
         }
-
+        ret = strdup(strValue.c_str());
         return ret;
     }