Add another missing check for uninitialized DRI.
Spotted by Chris Taylor.
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@ -348,7 +348,8 @@ static void FreeScreenConfigs(__GLXdisplayPrivate *priv)
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Xfree((char*) psc->serverGLXexts);
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#ifdef GLX_DIRECT_RENDERING
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psc->driScreen->destroyScreen(psc);
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if (psc->driScreen)
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psc->driScreen->destroyScreen(psc);
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#endif
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}
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XFree((char*) priv->screenConfigs);
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