Fix 1D numpy array formatting.

gstlal/python/pipeio.py

@@ -111,6 +111,8 @@ def format_property(prop):
 		return [to_gvalue_array(row) for row in prop]
 
 	elif is_listlike(prop):
+		if isinstance(prop, numpy.array):
+			prop = prop.tolist()
 		return to_gvalue_array(prop)
 
 	else: