Updated fetching targetSize for full-screen image.
Updated fetching targetSize for full-screen image.

North-American-Signs/DKImagePickerController,zhangao0086/DKImagePickerController,jpipard/DKImagePickerController,gorjuspixels/DKImagePickerController,metasmile/DKImagePickerController,jpipard/DKImagePickerController,gorjuspixels/DKImagePickerController,zhangao0086/DKImagePickerController,metasmile/DKImagePickerController,North-American-Signs/DKImagePickerController