cmake BUGFIX fix list(REMOVE_ITEM ...) (#2332)

When using a cmake version <= 3.19 the compat check fails with:

CMake Error at CMakeModules/UseCompat.cmake:48 (list):
  list sub-command REMOVE_ITEM requires two or more arguments.

To solve the issue we simply add an empty element "".

Signed-off-by: Heiko Thiery <[email protected]>

Author: hthiery

CMakeModules/UseCompat.cmake

@@ -45,7 +45,7 @@ macro(USE_COMPAT)
     find_package(Threads)
     list(APPEND CMAKE_REQUIRED_LIBRARIES ${CMAKE_THREAD_LIBS_INIT})
     check_function_exists(pthread_mutex_timedlock HAVE_PTHREAD_MUTEX_TIMEDLOCK)
-    list(REMOVE_ITEM CMAKE_REQUIRED_LIBRARIES ${CMAKE_THREAD_LIBS_INIT})
+    list(REMOVE_ITEM CMAKE_REQUIRED_LIBRARIES ${CMAKE_THREAD_LIBS_INIT} "") # cmake <= 3.19 needs at least one item
 
     test_big_endian(IS_BIG_ENDIAN)