mingw32: properly check if vfw capture is supported by the system headers

Remove check for an specific w32api version, checking instead if vfw.h
supports vfw capture. The defines in w32api 3.12 were wrong, so this must be
accounted for in the check.

Originally committed as revision 24203 to svn://svn.ffmpeg.org/ffmpeg/trunk

configure

@@ -1362,7 +1362,7 @@ oss_indev_deps_any="soundcard_h sys_soundcard_h"
 oss_outdev_deps_any="soundcard_h sys_soundcard_h"
 v4l_indev_deps="linux_videodev_h"
 v4l2_indev_deps_any="linux_videodev2_h sys_videoio_h"
-vfwcap_indev_deps="capCreateCaptureWindow"
+vfwcap_indev_deps="capCreateCaptureWindow vfwcap_defines"
 vfwcap_indev_extralibs="-lavicap32"
 x11_grab_device_indev_deps="x11grab XShmCreateImage"
 x11_grab_device_indev_extralibs="-lX11 -lXext -lXfixes"
@@ -2274,9 +2274,6 @@ case $target_os in
         if ! check_cpp_condition _mingw.h "defined (__MINGW64_VERSION_MAJOR)"; then
             check_cpp_condition _mingw.h "(__MINGW32_MAJOR_VERSION > 3) || (__MINGW32_MAJOR_VERSION == 3 && __MINGW32_MINOR_VERSION >= 15)" ||
                 die "ERROR: MinGW runtime version must be >= 3.15."
-            enabled_any vfwcap_indev &&
-                { check_cpp_condition w32api.h "(__W32API_MAJOR_VERSION > 3) || (__W32API_MAJOR_VERSION == 3 && __W32API_MINOR_VERSION >= 13)" ||
-                  die "ERROR: vfwcap_indev requires w32api version 3.13 or later."; }
         fi
         ;;
     cygwin*)
@@ -2721,6 +2718,9 @@ check_header linux/videodev2.h
 check_header sys/videoio.h
 
 check_func_headers "windows.h vfw.h" capCreateCaptureWindow "$vfwcap_indev_extralibs"
+# check that WM_CAP_DRIVER_CONNECT is defined to the proper value
+# w32api 3.12 had it defined wrong
+check_cpp_condition vfw.h "WM_CAP_DRIVER_CONNECT > WM_USER" && enable vfwcap_defines
 
 # check for ioctl_meteor.h, ioctl_bt848.h and alternatives
 { check_header dev/bktr/ioctl_meteor.h &&