qtcapture: fix compilation on 10.6 (cherry picked from commit 0ccf1405c045aabbeacb1ccb6eccbc54b96eb5c5)
qtcapture: fix compilation on 10.6
(cherry picked from commit 0ccf1405c045aabbeacb1ccb6eccbc54b96eb5c5)

jomanmuk/vlc-2.1,vlc-mirror/vlc-2.1,vlc-mirror/vlc-2.1,vlc-mirror/vlc-2.1,jomanmuk/vlc-2.1,vlc-mirror/vlc-2.1,vlc-mirror/vlc-2.1,jomanmuk/vlc-2.1,vlc-mirror/vlc-2.1,jomanmuk/vlc-2.1,jomanmuk/vlc-2.1,vlc-mirror/vlc-2.1,jomanmuk/vlc-2.1,jomanmuk/vlc-2.1