Fix zipcmp build with cmake.

src/CMakeLists.txt

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 8ac0ae2..de80164 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -6,7 +6,7 @@
   SET(SRC_EXTRA_FILES getopt.c)
 ENDIF(NOT HAVE_GETOPT)
 
-ADD_EXECUTABLE(zipcmp zipcmp.c dir.c parray.c parray_push.c parray_pop.c ${SRC_EXTRA_FILES})
+ADD_EXECUTABLE(zipcmp zipcmp.c ${SRC_EXTRA_FILES})
 TARGET_LINK_LIBRARIES(zipcmp zip)
 INSTALL(TARGETS zipcmp RUNTIME DESTINATION bin)