glx: Add assert to check input to memcpy.
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@ -379,6 +379,7 @@ CreateDrawable(Display * dpy, const __GLcontextModes * fbconfig,
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req->glxwindow = (GLXWindow) XAllocID(dpy);
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req->glxwindow = (GLXWindow) XAllocID(dpy);
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req->numAttribs = (CARD32) i;
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req->numAttribs = (CARD32) i;
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assert(attrib_list);
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memcpy(data, attrib_list, 8 * i);
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memcpy(data, attrib_list, 8 * i);
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UnlockDisplay(dpy);
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UnlockDisplay(dpy);
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