[MPlayer-cygwin] Several bugs in vidix support under Cygwin

[Goodwu]

Maybe the vidix support under cygwin is not ready to use, but I still think that the compile should be without any problem.
1.
	In vidix/, the declaration of vidix_querey_fourcc is deffernt in vosub_vidix.c and
	vosub_vidix.h:

	gcc -c -O4 -march=i486 -mcpu=i686 -pipe -ffast-math -fomit-frame-pointer -D_LARG
	EFILE_SOURCE -D_FILE_OFFSET_BITS=64 -D__CYGWIN__ -I. -I.. -I/usr/local/include -
	I/usr/local/include/freetype2 -I/usr/local/include/SDL -mcygwin  -I/usr/local/in
	clude    -DMPG12PLAY  -DVIDIX_PATH='"/usr/local/lib/mplayer/vidix/"' -o vosub_vi
	dix.o vosub_vidix.c
	vosub_vidix.c:341: error: conflicting types for `vidix_query_fourcc'
	vosub_vidix.h:25: error: previous declaration of `vidix_query_fourcc'
	make[1]: *** [vosub_vidix.o] Error 1
	make[1]: Leaving directory `/home/www/main-cygwin/libvo'
	make: *** [libvo/libvo.a] Error 2

2.
	In libdha/Makefile, there's no VSHORTNAME defined here:
	ifeq ($(TARGET_OS),CYGWIN)
	SHORTNAME = libdha.dll
	else
	
	So the following lines:
	    ln -sf $(LIBNAME) $(SHORTNAME)
	    ln -sf $(LIBNAME) $(VSHORTNAME)
	become:
		ln -sf libdha.so.0.1  libdha.dll
		ln -sf libdha.so.0.1

3.
	In vidix/drivers/: 
	../../libdha/libdha.dll(.text+0x0):fake: multiple definition of `___do_sjlj_init'
	/usr/lib/gcc-lib/i686-pc-cygwin/3.3.1/crtbegin.o(.text+0x0): first defined here
	make[1]: *** [cyberblade_vid.so] Error 1