Fix CurlFile::Exists/Stat for check ftp directory with proper cwd method.
Fix double append to m_curlAliasList bug by NULL check.
Fix memory leak, Exists/Stat allocated resource not released correctly.
Make sure call CurlFile::Exists with url path ends with slash for ftp dir.
[Application] Silence warning double -> int
[AESinkNull] Silence warning double -> int
[IOS] Fix long press gesture send mouse right down/up/move event correctly.
[IOS] Fix no mouse left up event problem by using single tap gesture recognizer.
[IOS] Fix no gesture end event problem when gesture be canceled.
Merge pull request #2291 from ace20022/warnings

Silence warnings double -> int
Merge pull request #2292 from ulion/fix_ios_gesture_end_not_sent_when_canceled

[IOS] Fix ios gesture end event not sent problem when gesture canceled
Merge pull request #2296 from ulion/fix_ios_gesture_longpress_override_pan_problem

[IOS] Fix long press gesture send mouse right down/up/move event correctly
Merge pull request #2279 from ulion/fix_curl_slist

Fix curl slist related double append and memory leak
Merge pull request #2274 from ulion/fix_curl_exists_stat_for_ftpdir

Fix CurlFile::Exists/Stat for check ftp directory with proper cwd method.