abort when nested (bugfix) (#94)

* abort when nested (bugfix)

* update error message

* update error message

Author: TheLartians

cmake/CPM.cmake

@@ -28,17 +28,18 @@
 
 cmake_minimum_required(VERSION 3.14 FATAL_ERROR)
 
-set(CURRENT_CPM_VERSION 0.15) 
+set(CURRENT_CPM_VERSION 0.15.1)
 
 if(CPM_DIRECTORY)
   if(NOT ${CPM_DIRECTORY} MATCHES ${CMAKE_CURRENT_LIST_DIR})
     if (${CPM_VERSION} VERSION_LESS ${CURRENT_CPM_VERSION})
       message(AUTHOR_WARNING "${CPM_INDENT} \
-A dependency is using a more recent CPM (${NEW_CPM_VERSION}) than the current project (${CPM_VERSION}). \
+A dependency is using a more recent CPM version (${CURRENT_CPM_VERSION}) than the current project (${CPM_VERSION}). \
 It is recommended to upgrade CPM to the most recent version. \
-See https://github.com/TheLartians/CPM for more information."
+See https://github.com/TheLartians/CPM.cmake for more information."
       )
     endif()
+    return()
   endif()
 endif()