Initialize have_back.

There is a user somewhere that tests it before its initial set.

Signed-off-by: Eric Anholt <eric@anholt.net>

diff --git a/src/glx/dri2_glx.c b/src/glx/dri2_glx.c
index 9347611e7d8b5fb4de65d249c70dc9feb8d471e8..73d11f14a14cb2a92b9efadf9d16ace2e25ec8ba 100644 (file)
--- a/src/glx/dri2_glx.c
+++ b/src/glx/dri2_glx.c
@@ -194,6 +194,7 @@ dri2CreateDrawable(__GLXscreenConfigs * psc,
    pdraw->base.psc = psc;
    pdraw->bufferCount = 0;
    pdraw->swap_interval = 1; /* default may be overridden below */
+   pdraw->have_back = 0;
 
    if (psc->config)
       psc->config->configQueryi(psc->__driScreen, "vblank_mode", &vblank_mode);