build BUGFIX properly get libssh version

Author: michalvasko

CMakeLists.txt

@@ -189,7 +189,7 @@ endif()
 if(ENABLE_SSH)
     find_package(LibSSH 0.7.0 REQUIRED)
     set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -DNC_ENABLED_SSH")
-    if(LibSSH_PACKAGE_FIND_VERSION LESS 0.8.0)
+    if(LibSSH_VERSION VERSION_LESS 0.8.0)
         target_link_libraries(netconf2 "-L${LIBSSH_LIBRARY_DIR}" -lssh -lssh_threads -lcrypt)
     else()
         target_link_libraries(netconf2 "-L${LIBSSH_LIBRARY_DIR}" -lssh -lcrypt)