stdint types all the way!

Change-Id: I4e4ef3a2002fc59ebd9097087f150eaf3f2a7e08
diff --git a/runtime/gc/allocator/rosalloc-inl.h b/runtime/gc/allocator/rosalloc-inl.h
index c69ca48..dd419a4 100644
--- a/runtime/gc/allocator/rosalloc-inl.h
+++ b/runtime/gc/allocator/rosalloc-inl.h
@@ -36,7 +36,7 @@
   }
   // Check if the returned memory is really all zero.
   if (kCheckZeroMemory && m != nullptr) {
-    byte* bytes = reinterpret_cast<byte*>(m);
+    uint8_t* bytes = reinterpret_cast<uint8_t*>(m);
     for (size_t i = 0; i < size; ++i) {
       DCHECK_EQ(bytes[i], 0);
     }