g3dvl: use pointer_to_uintptr() to silence a cast warning
diff --git a/src/gallium/auxiliary/vl/vl_vlc.h b/src/gallium/auxiliary/vl/vl_vlc.h
index 17a7b65..4db1334 100644
--- a/src/gallium/auxiliary/vl/vl_vlc.h
+++ b/src/gallium/auxiliary/vl/vl_vlc.h
@@ -33,6 +33,7 @@
 #include <pipe/p_compiler.h>
 
 #include <util/u_math.h>
+#include "util/u_pointer.h"
 
 struct vl_vlc
 {
@@ -98,7 +99,7 @@
    vlc->valid_bits = 0;
 
    /* align the data pointer */
-   while((uint64_t)data & 3) {
+   while (pointer_to_uintptr(data) & 3) {
       vlc->buffer |= (uint64_t)*data << (56 - vlc->valid_bits);
       ++data;
       --len;