winscreencap: Fix configure check and compilation

configure.ac

@@ -576,23 +576,30 @@ AG_GST_CHECK_FEATURE(DIRECTDRAW, [DirectDraw plug-in], directdrawsink, [
 dnl Direct3D9
 AM_CONDITIONAL(USE_DIRECT3D9, true)
 AG_GST_CHECK_FEATURE(DIRECT3D9, [Direct3D9], winscreencap, [
-  HAVE_DIRECT3D="no"
-
+  HAVE_DIRECT3D9="no"
+  save_CFLAGS="$CFLAGS"
+  save_LDFLAGS="$LDFLAGS"
   save_LIBS="$LIBS"
-
+  CFLAGS="$CFLAGS $DIRECTX_CFLAGS"
+  LDFLAGS="$LDFLAGS $DIRECTX_LDFLAGS"
   LIBS="$LIBS -ld3d9 -lgdi32"
   AC_MSG_CHECKING(for Direct3D9 LDFLAGS)
-
-  AC_LINK_IFELSE([AC_LANG_PROGRAM([[
+  AC_LINK_IFELSE([
 #include <windows.h>
 #include <d3d9.h>
-]], [[
+
+int main ()
+{
   Direct3DCreate9(D3D_SDK_VERSION);
-]])],
+
+  return 0;
+}
+],
     [HAVE_DIRECT3D9="yes"],
     [HAVE_DIRECT3D9="no"])
   AC_MSG_RESULT($HAVE_DIRECT3D9)
-
+  CFLAGS=$save_CFLAGS
+  LDFLAGS=$save_LDFLAGS
   LIBS=$save_LIBS
 
   if test "x$HAVE_DIRECT3D9" = "xyes";  then

sys/winscreencap/Makefile.am

@@ -2,9 +2,9 @@ plugin_LTLIBRARIES = libgstwinscreencap.la
 
 libgstwinscreencap_la_SOURCES = gstdx9screencapsrc.c  gstgdiscreencapsrc.c  gstwinscreencap.c
 libgstwinscreencap_la_CFLAGS = $(GST_CFLAGS) $(GST_BASE_CFLAGS) \
-	$(GST_PLUGINS_BASE_CFLAGS)
+	$(GST_PLUGINS_BASE_CFLAGS) $(DIRECT3D9_CFLAGS) $(DIRECTX_CFLAGS)
 libgstwinscreencap_la_LIBADD = $(GST_BASE_LIBS) $(GST_PLUGINS_BASE_LIBS) \
-	$(DIRECT3D9_LIBS)
+	$(DIRECT3D9_LIBS) $(DIRECTX_LDFLAGS)
 libgstwinscreencap_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
 libgstwinscreencap_la_LIBTOOLFLAGS = --tag=disable-static