randr: unexport and document RROutputIsLeased()

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

@@ -595,9 +595,6 @@ extern _X_EXPORT Bool
 extern _X_EXPORT Bool
  RRCrtcGammaSetSize(RRCrtcPtr crtc, int size);
 
-extern _X_EXPORT Bool
-RROutputIsLeased(RROutputPtr output);
-
 /* rrmode.c */
 /*
  * Find, and if necessary, create a mode

randr/randrstr_priv.h

@@ -281,4 +281,12 @@ void RRLeaseFree(RRLeasePtr lease);
  */
 Bool RRCrtcIsLeased(RRCrtcPtr crtc);
 
+/*
+ * Check whether given output is leased
+ *
+ * @param output  the output to check
+ * @return TRUE if theere is any active lease on that output
+ */
+Bool RROutputIsLeased(RROutputPtr output);
+
 #endif /* _XSERVER_RANDRSTR_PRIV_H_ */