"integral literal" should be "integer literal"

[sdutoit]

/Users/sdutoit/dev/c++/draft/source/lex.tex:
535
536 \pnum
537: Preprocessing number tokens lexically include all integral literal
538 tokens~(\ref{lex.icon}) and all floating literal
539 tokens~(\ref{lex.fcon}).
...
541 \pnum
542 A preprocessing number does not have a type or a value; it acquires both
543: after a successful conversion to an integral literal token or a floating literal
544 token.%
545 \index{number!preprocessing|)}