xf86drm: Fix ioctl struct clearing in drmGetVersion

Oops, fumbled that one.

Reported-by: Jan Vesely <jan.vesely@rutgers.edu>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
diff --git a/xf86drm.c b/xf86drm.c
index a2e24eb..ed38547 100644
--- a/xf86drm.c
+++ b/xf86drm.c
@@ -768,7 +768,7 @@
     drmVersionPtr retval;
     drm_version_t *version = drmMalloc(sizeof(*version));
 
-    memclear(version);
+    memclear(*version);
 
     if (drmIoctl(fd, DRM_IOCTL_VERSION, version)) {
 	drmFreeKernelVersion(version);