PDL: Util fixup

Test: add a type with a large enum value
enum BadType : 4 {
  ZERO = 0,
  ONE = 1,
  TWO = 2,
  THREE = 0xffffff,
}
ERROR: AddEntry: Value of THREE(16777215) is greater than the max possible value for enum BadType(15)
Change-Id: Ieb9920818723a56c9f05342b895c172ee772a2b0