fixed memory leak in cap_libv4l.cpp (ticket #1518; thanks to gorgen for the patch)
fixed memory leak in cap_libv4l.cpp (ticket #1518; thanks to gorgen for the patch)

apavlenko/opencv,apavlenko/opencv,opencv/opencv,opencv/opencv,opencv/opencv,apavlenko/opencv,apavlenko/opencv,opencv/opencv,opencv/opencv,opencv/opencv,opencv/opencv,apavlenko/opencv,opencv/opencv,opencv/opencv,opencv/opencv,apavlenko/opencv