os/bluestore: fix bluestore_blob_use_tracker_t::equal()

Consider the following case:
bluestore_blob_use_tracker_t<1>(num_au = 1): tracked_use_range[0, 1000]
bluestore_blob_use_tracker_t<2>(num_au = 0): tracked_use_range[1, 1001]

the original coding logical will treat <1> to be equal to <2>, which is actually not.

For now, the only consumer of the method is BlueStore::fsck(),
so we can simply fix the above case by narrowing the condition.

Signed-off-by: xie xingguo <xie.xingguo@zte.com.cn>

src/os/bluestore/bluestore_types.cc

@@ -504,18 +504,7 @@ bool bluestore_blob_use_tracker_t::equal(
     return true;
   }
 
-  uint32_t n = num_au ? num_au : other.num_au;
-  uint32_t referenced = 
-    num_au ? other.get_referenced_bytes() : get_referenced_bytes();
-   auto bytes_per_au_tmp = num_au ? bytes_per_au : other.bytes_per_au;
-  uint32_t my_referenced = 0;
-  for (size_t i = 0; i < n; i++) {
-    my_referenced += bytes_per_au_tmp[i];
-    if (my_referenced > referenced) {
-      return false;
-    }
-  }
-  return my_referenced == referenced;
+  return false;
 }
 
 void bluestore_blob_use_tracker_t::dump(Formatter *f) const