Update compiler/rustc_middle/src/mir/interpret/allocation.rs

Author: saethlin

compiler/rustc_middle/src/mir/interpret/allocation.rs

@@ -155,7 +155,7 @@ fn all_zero(buf: &[u8]) -> bool {
     }
     // Just fast-rejecting based on the first element significantly reduces the amount that we end
     // up walking the whole array.
-    if buf.get(0) != Some(0) {
+    if buf.get(0) != Some(&0) {
         return false;
     }