textproc/libxml2: Fix cmake fileHEADmain

The port's cmake file is wrong because there is an unclosed
if-statement.
Can check with 'cmake -P test-libxml2.cmake' where the content of
test-libxml2.cmake is:
include("/usr/local/lib/cmake/libxml2/libxml2-config.cmake")

The test's result is:
CMake Error at /usr/local/lib/cmake/libxml2/libxml2-config.cmake:53 (if):
  Flow control statements are not properly nested.
Call Stack (most recent call first):
  test-libxml2.cmake:1 (include)

Approved by:	portmgr (blanket, trivial runtime fix)

0 files changed, 0 insertions, 0 deletions