randr: unexport and document RRXineramaExtensionInit()

Not used by any external drivers, so no need to keep it exported.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>

randr/randrstr.h

@@ -667,12 +667,6 @@ RRConfigureOutputProperty(RROutputPtr output, Atom property,
 /* rrprovider.c */
 #define PRIME_SYNC_PROP         "PRIME Synchronization"
 
-/* rrxinerama.c */
-#ifdef XINERAMA
-extern _X_EXPORT void
- RRXineramaExtensionInit(void);
-#endif
-
 #endif                          /* _RANDRSTR_H_ */
 
 /*

randr/randrstr_priv.h

@@ -518,4 +518,9 @@ int RRConfigureProviderProperty(RRProviderPtr provider, Atom property,
                                 Bool pending, Bool range, Bool immutable,
                                 int num_values, INT32 *values);
 
+/*
+ * Init xinerama specific extension parts
+ */
+void RRXineramaExtensionInit(void);
+
 #endif /* _XSERVER_RANDRSTR_PRIV_H_ */