fix vc

Author: ferdymercury

cmake/modules/SearchInstalledSoftware.cmake

@@ -1384,9 +1384,9 @@ endif()
 
 #---Check for Vc---------------------------------------------------------------------
 if(builtin_vc)
+  unset(Vc_FOUND)
+  unset(Vc_FOUND CACHE)
   if(NOT vc)
-    unset(Vc_FOUND)
-    unset(Vc_FOUND CACHE)
     set(vc ON CACHE BOOL "Enabled because builtin_vc requested (${vc_description})" FORCE)
   endif()
 elseif(vc)