prevent a precedence warning on clang

Dumper.xs:245:29: warning: '&&' within '||' [-Wlogical-op-parentheses]
                   ((k >= 7 && k <= 10 || k == 12 || k == 13 || k == 27)
                     ~~~~~~~^~~~~~~~~~ ~~
Dumper.xs:245:29: note: place parentheses around the '&&' expression to silence
      this warning
                   ((k >= 7 && k <= 10 || k == 12 || k == 13 || k == 27)