Fix implicit declaration of functions.
https://sourceforge.net/p/xine/mailman/message/37402884/
--- configure.orig	2023-03-03 01:26:38.000000000 -0600
+++ configure	2023-03-03 01:26:38.000000000 -0600
@@ -28559,10 +28559,11 @@
             cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
+#include <X11/extensions/vldXvMC.h>
 int
 main ()
 {
-XvMCPutSlice()
+XvMCPutSlice(0,0,0,0)
   ;
   return 0;
 }
@@ -28574,10 +28575,11 @@
                             cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
+#include <X11/extensions/vldXvMC.h>
 int
 main ()
 {
-XvMCPutSlice()
+XvMCPutSlice(0,0,0,0)
   ;
   return 0;
 }
@@ -28612,10 +28614,12 @@
                 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
+#include <X11/Xlib.h>
+#include <X11/extensions/XvMClib.h>
 int
 main ()
 {
-XvMCCreateContext()
+XvMCCreateContext(0,0,0,0,0,0,0)
   ;
   return 0;
 }
@@ -28627,10 +28631,12 @@
                                 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
+#include <X11/Xlib.h>
+#include <X11/extensions/XvMClib.h>
 int
 main ()
 {
-XvMCCreateContext()
+XvMCCreateContext(0,0,0,0,0,0,0)
   ;
   return 0;
 }
@@ -28671,10 +28677,12 @@
             cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
+#include <X11/Xlib.h>
+#include <X11/extensions/XvMClib.h>
 int
 main ()
 {
-XvMCCreateContext()
+XvMCCreateContext(0,0,0,0,0,0,0)
   ;
   return 0;
 }
@@ -28686,10 +28694,12 @@
                             cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
+#include <X11/Xlib.h>
+#include <X11/extensions/XvMClib.h>
 int
 main ()
 {
-XvMCCreateContext()
+XvMCCreateContext(0,0,0,0,0,0,0)
   ;
   return 0;
 }