Mesa (master): glx: Don't try to swap a front buffer if we don't have one.

[Eric Anholt]

Module: Mesa
Branch: master
Commit: 9a12a3925a82475fd8f01ba53987581d30dd1128
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=9a12a3925a82475fd8f01ba53987581d30dd1128

Author: Eric Anholt <eric at anholt.net>
Date:   Fri Jul 23 13:41:13 2010 -0700

glx: Don't try to swap a front buffer if we don't have one.

Fixes glean glsl1 since 7b7845a076c933e096ac511b4184141ba194449a

---

 src/glx/dri2_glx.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/src/glx/dri2_glx.c b/src/glx/dri2_glx.c
index 2f12387..ae5bf53 100644
--- a/src/glx/dri2_glx.c
+++ b/src/glx/dri2_glx.c
@@ -423,12 +423,13 @@ dri2FlushFrontBuffer(__DRIdrawable *driDrawable, void *loaderPrivate)
    struct dri2_drawable *pdraw = loaderPrivate;
    __GLXdisplayPrivate *priv = __glXInitialize(pdraw->base.psc->dpy);
    struct dri2_display *pdp = (struct dri2_display *)priv->dri2Display;
+   GLXContext gc = __glXGetCurrentContext();
 
    /* Old servers don't send invalidate events */
    if (!pdp->invalidateAvailable)
        dri2InvalidateBuffers(priv->dpy, pdraw->base.drawable);
 
-   dri2_copy_drawable(pdraw, DRI2BufferFrontLeft, DRI2BufferFakeFrontLeft);
+   dri2_wait_gl(gc);
 }