Eliminate warnings

llvm-svn: 13704
diff --git a/llvm/runtime/GC/SemiSpace/semispace.c b/llvm/runtime/GC/SemiSpace/semispace.c
index 3792f86..93327ed 100644
--- a/llvm/runtime/GC/SemiSpace/semispace.c
+++ b/llvm/runtime/GC/SemiSpace/semispace.c
@@ -86,7 +86,7 @@
 
 
 static void process_root(void **Root, void *Meta) {
-  printf("process_root[0x%X] = 0x%X\n", Root, *Root);
+  printf("process_root[0x%X] = 0x%X\n", (unsigned) Root, (unsigned) *Root);
 }
 
 void llvm_gc_collect() {