patch 7.4.1315
Problem:    Using a channel handle does not allow for freeing it when unused.
Solution:   Add the Channel variable type.
diff --git a/src/if_python.c b/src/if_python.c
index 17d15bd..d319a39 100644
--- a/src/if_python.c
+++ b/src/if_python.c
@@ -1561,6 +1561,7 @@
 	case VAR_FLOAT:
 	case VAR_SPECIAL:
 	case VAR_JOB:
+	case VAR_CHANNEL:
 	    break;
     }
 }