One set of CFLAGS for all DirectX-based plugins. Correct header/library
checks for DirectX-based-plugins. Remove unused variable and label in
directsoundsrc.
Fixes#593068.
Original commit message from CVS:
* configure.ac:
* sys/directdraw/Makefile.am:
* sys/directsound/Makefile.am:
Add DIRECTDRAW_CFLAGS and DIRECTSOUND_CFLAGS to Makefile.am; save
and restore the various flags in the directdraw/directsound
detection section. Apparently improves cross-compiling for win32
with mingw32 under some circumstances (#437539).
Original commit message from CVS:
Patch by: Vincent Torri <vtorri at univ-evry fr>
* configure.ac:
* sys/Makefile.am:
* sys/directsound/Makefile.am:
* sys/directsound/gstdirectsoundsink.c:
(gst_directsoundsink_reset):
Add directsoundsink to build and dist it, so it gets built when
compiling with MingW on win32 and the required headers and libraries
are available (fixes: #392638). Also simplify DirectDraw check a bit.
* tests/check/elements/.cvsignore:
Fix CVS ignore for neonhttpsrc test binary.
