randr: unexport and document RRCrtcInitErrorValue()

Not supposed to be called by drivers, just internal to the randr extsnsion,
so shouldn't have been exported in the first place.

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

randr/randrstr.h

@@ -595,12 +595,6 @@ extern _X_EXPORT Bool
 extern _X_EXPORT Bool
  RRCrtcGammaSetSize(RRCrtcPtr crtc, int size);
 
-/*
- * Initialize crtc type error value
- */
-extern _X_EXPORT void
- RRCrtcInitErrorValue(void);
-
 /*
  * Detach and free a scanout pixmap
  */

randr/randrstr_priv.h

@@ -223,4 +223,10 @@ void RRCrtcDestroy(RRCrtcPtr crtc);
  */
 Bool RRCrtcInit(void);
 
+
+/*
+ * Initialize crtc type error value
+ */
+void RRCrtcInitErrorValue(void);
+
 #endif /* _XSERVER_RANDRSTR_PRIV_H_ */