Only assign value once the dictionary count is more than 0
Only assign value once the dictionary count is more than 0

#118

mingsai/XCDYouTubeVideoPlayerViewController,mingsai/XCDYouTubeVideoPlayerViewController,creationst/XCDYouTubeKit,creationst/XCDYouTubeKit,twobitlabs/XCDYouTubeKit,0xced/XCDYouTubeKit,creationst/XCDYouTubeKit,twobitlabs/XCDYouTubeKit,mingsai/XCDYouTubeVideoPlayerViewController,twobitlabs/XCDYouTubeKit,mingsai/XCDYouTubeVideoPlayerViewController,creationst/XCDYouTubeKit,twobitlabs/XCDYouTubeKit,0xced/XCDYouTubeKit,0xced/XCDYouTubeKit,0xced/XCDYouTubeKit