[PATCH:xserver] Fix modesetting build when glamor is disabled

[Alan Coopersmith]

present.c: In function ‘ms_present_queue_vblank’:
present.c:144:31: error: implicit declaration of function ‘ms_flush_drm_events’
[-Werror=implicit-function-declaration]
         if (errno != EBUSY || ms_flush_drm_events(screen) < 0) {
                               ^
present.c:144:9: warning: nested extern declaration of ‘ms_flush_drm_events’
[-Wnested-externs]
         if (errno != EBUSY || ms_flush_drm_events(screen) < 0) {
         ^

Signed-off-by: Alan Coopersmith <alan.coopersmith at oracle.com>
---
 hw/xfree86/drivers/modesetting/present.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/hw/xfree86/drivers/modesetting/present.c b/hw/xfree86/drivers/modesetting/present.c
index 55b622c..288957d 100644
--- a/hw/xfree86/drivers/modesetting/present.c
+++ b/hw/xfree86/drivers/modesetting/present.c
@@ -141,7 +141,10 @@ ms_present_queue_vblank(RRCrtcPtr crtc,
         /* If we hit EBUSY, then try to flush events.  If we can't, then
          * this is an error.
          */
-        if (errno != EBUSY || ms_flush_drm_events(screen) < 0) {
+#ifdef GLAMOR
+        if (errno != EBUSY || ms_flush_drm_events(screen) < 0)
+#endif
+        {
 	    ms_drm_abort_seq(scrn, seq);
             return BadAlloc;
         }
-- 
2.7.4