parent != parrent

[bch <brad.harder%gmail.com@localhost>]

/usr/src/tools/mandoc/../../external/bsd/mdocml/bin/mandoc/../../dist/eqn.c:995:10:
error: 'parrent' undeclared (first use in this function)
   while (parrent && parent->type == EQN_LISTONE &&
          ^