Fix PG object count statistics on deletion of non-existing objects

src/osd/osd_primary.cpp

@@ -722,6 +722,9 @@ resume_3:
         cur_op->reply.rw.version = op_data->fact_ver;
         goto continue_others;
     }
+    // If not already deleted:
+    if (op_data->fact_ver)
+    {
         // Save version override for parallel reads
         pg.ver_override[op_data->oid] = op_data->fact_ver;
         // Submit deletes
@@ -770,6 +773,7 @@ resume_5:
             }
         }
         pg.total_count--;
+    }
     cur_op->reply.hdr.retval = 0;
     // indicate possibly unfinished (left_on_dead) deletions
     cur_op->reply.del.flags = OSD_DEL_SUPPORT_LEFT_ON_DEAD;