capCreateCaptureWindow() check.
Based on patch by kemuri <kemuri9 at gmail dot com>
Originally committed as revision 21409 to svn://svn.ffmpeg.org/ffmpeg/trunk
check_header linux/videodev2.h
check_header sys/videoio.h
-check_func_headers "windows.h vfw.h" capCreateCaptureWindow -lvfw32
+check_func_headers "windows.h vfw.h" capCreateCaptureWindow "$vfwcap_indev_extralibs"
# check for ioctl_meteor.h, ioctl_bt848.h and alternatives
{ check_header dev/bktr/ioctl_meteor.h &&