Prevent check variable leaking into caller scope (#457)

CraigHutchinson · web-flow · commit af3f1ca81448 · 2023-02-27T12:48:00.000+01:00
diff --git a/cmake/get_cpm.cmake b/cmake/get_cpm.cmake
@@ -27,6 +27,7 @@ else()
   if("${check}" STREQUAL "")
     download_cpm()
   endif()
+  unset(check)
 endif()
 
 include(${CPM_DOWNLOAD_LOCATION})
