fix build with VM_CRANGE

ef131a54 · Nickolai Zeldovich · 31354f3d · ef131a54
--- a/kernel/vm.cc
+++ b/kernel/vm.cc
@@ -275,7 +275,7 @@ vmap::copy(int share)
        continue;
 #endif
      cprintf("non-empty span 0x%lx--0x%lx in %p: %p\n",
-              ne->vma_start, ne->vma_end, &nm->rx, x);
+              ne->vma_start, ne->vma_end, nm, x);
      assert(0);  /* span must be empty */
    }
 #if VM_CRANGE