Cardioid CMake patch

cardioid-cmake.patch

diff --git a/elec/CMakeLists.txt b/elec/CMakeLists.txt
index 4a526cb..ccc5c76 100644
--- a/elec/CMakeLists.txt
+++ b/elec/CMakeLists.txt
@@ -271,7 +271,7 @@ function(get_recursive_list retvar target prop)
   list(APPEND searched ${target})
   #message(SEND_ERROR "=== ${target} ${prop} ${searched}")
   
-  set(${retval} "")
+  set(retval "")
   get_property(propval TARGET ${target} PROPERTY ${prop} SET)
   if (propval)
     get_target_property(propval ${target} ${prop})
@@ -287,6 +287,10 @@ function(get_recursive_list retvar target prop)
       list(APPEND retval ${recursive_val})
     endif()
   endforeach()
+
+   if(NOT retval)
+     list(REMOVE_DUPLICATES retval)
+   endif()
   
   set(${retvar} ${retval} PARENT_SCOPE)
   #message(SEND_ERROR "--- ${target} ${prop} ${retval}")