Don't build dynamicoverlay for Win32 (either using mingw32 or mingwce).

configure.ac

@@ -1200,7 +1200,7 @@ dnl
 VLC_ADD_PLUGINS([dummy logger memcpy])
 VLC_ADD_PLUGINS([mpgv mpga m4v m4a h264 vc1 demux_cdg cdg ps pva avi asf mp4 rawdv rawvid nsv real aiff mjpeg demuxdump flacsys tta])
 VLC_ADD_PLUGINS([cvdsub svcdsub spudec subsdec subsusf t140 dvbsub cc mpeg_audio lpcm a52 dts cinepak flac])
-VLC_ADD_PLUGINS([deinterlace invert adjust transform wave ripple psychedelic gradient motionblur rv32 rotate noise grain extract sharpen seamcarving croppadd dynamicoverlay blendbench])
+VLC_ADD_PLUGINS([deinterlace invert adjust transform wave ripple psychedelic gradient motionblur rv32 rotate noise grain extract sharpen seamcarving croppadd blendbench])
 VLC_ADD_PLUGINS([converter_fixed mono])
 VLC_ADD_PLUGINS([trivial_resampler ugly_resampler])
 VLC_ADD_PLUGINS([trivial_channel_mixer trivial_mixer])
@@ -1240,6 +1240,7 @@ dnl Some plugins aren't useful on some platforms
 dnl
 if test "${SYS}" != "mingw32" -a "${SYS}" != "mingwce"; then
     VLC_ADD_PLUGINS([screensaver motion])
+    VLC_ADD_PLUGINS([dynamicoverlay])
 elif test "${SYS}" != "mingwce"; then
     VLC_ADD_PLUGINS([ntservice access_smb dmo msn])
     VLC_ADD_LIBS([dmo],[-lole32 -luuid])