os: unexport OsVendorVErrorFProc pointer

This pointer allows a DDX to install it's own error print handler. It's really
only intended for DDXes, thus no need to have it exported to modules.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1369>

hw/xwin/InitOutput.c

@@ -31,6 +31,9 @@ from The Open Group.
 #ifdef HAVE_XWIN_CONFIG_H
 #include <xwin-config.h>
 #endif
+
+#include "os/osdep.h"
+
 #include "win.h"
 #include "winmsg.h"
 #include "winconfig.h"

hw/xwin/winprocarg.c

@@ -36,6 +36,7 @@ from The Open Group.
 #endif
 
 #include "os/cmdline.h"
+#include "os/osdep.h"
 
 #include <../xfree86/common/xorgVersion.h>
 #include "win.h"

include/os.h

@@ -90,10 +90,6 @@ typedef struct _NewClientRec *NewClientPtr;
 extern void ddxBeforeReset(void);
 #endif
 
-extern _X_EXPORT void (*OsVendorVErrorFProc) (const char *,
-                                              va_list args)
-_X_ATTRIBUTE_PRINTF(1, 0);
-
 extern _X_EXPORT Bool WaitForSomething(Bool clients_are_ready);
 
 extern _X_EXPORT int ReadRequestFromClient(ClientPtr /*client */ );

os/osdep.h

@@ -170,4 +170,8 @@ int os_move_fd(int fd);
    depending on whether multithreading is used */
 int xthread_sigmask(int how, const sigset_t *set, sigset_t *oldest);
 
+/* callback for DDX specific error printing, if any (may be NULL) */
+extern void (*OsVendorVErrorFProc) (const char *, va_list args)
+    _X_ATTRIBUTE_PRINTF(1, 0);
+
 #endif                          /* _OSDEP_H_ */