Don't check for EINTR and replace xioctl with ioctl

This should be safe todo unless we are writing a signal handler.

cmake/OpenCVFindLibsVideo.cmake

@@ -85,18 +85,12 @@ if(WITH_XINE)
 endif(WITH_XINE)
 
 # --- V4L ---
-ocv_clear_vars(HAVE_LIBV4L HAVE_CAMV4L HAVE_CAMV4L2 HAVE_IOCTL_ULONG)
+ocv_clear_vars(HAVE_LIBV4L HAVE_CAMV4L HAVE_CAMV4L2 HAVE_VIDEOIO)
 if(WITH_V4L)
   CHECK_MODULE(libv4l1 HAVE_LIBV4L)
   CHECK_INCLUDE_FILE(linux/videodev.h HAVE_CAMV4L)
   CHECK_INCLUDE_FILE(linux/videodev2.h HAVE_CAMV4L2)
   CHECK_INCLUDE_FILE(sys/videoio.h HAVE_VIDEOIO)
-  INCLUDE(CheckPrototypeDefinition)
-  CHECK_PROTOTYPE_DEFINITION(ioctl
-    "int ioctl(int d, unsigned long request, ...)"
-    "-1"
-    "sys/ioctl.h"
-    HAVE_IOCTL_ULONG)
 endif(WITH_V4L)
 
 # --- OpenNI ---