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_python3.c b/src/if_python3.c
index 77a9ea3..7d69b0c 100644
--- a/src/if_python3.c
+++ b/src/if_python3.c
@@ -1654,6 +1654,7 @@
 	case VAR_FLOAT:
 	case VAR_SPECIAL:
 	case VAR_JOB:
+	case VAR_CHANNEL:
 	    break;
     }
 }