gstlal_inspiral: fix busted caps setting on appsinks

gstlal-inspiral/bin/gstlal_inspiral

@@ -720,7 +720,7 @@ for output_file_number, (svd_bank, output_filename, likelihood_namedtuple, zero_
 	if options.verbose:
 		print >>sys.stderr, "attaching appsinks to pipeline ...",
 	appsync = pipeparts.AppSync(appsink_new_buffer = output.appsink_new_buffer)
-	appsinks = set(appsync.add_sink(pipeline, pipeparts.mkqueue(pipeline, src), caps = Gst.Caps("application/x-lal-snglinspiral"), name = "%s_sink_%d" % (instrument, n)) for instrument, srcs in triggersrc.items() for n, src in enumerate(srcs))
+	appsinks = set(appsync.add_sink(pipeline, pipeparts.mkqueue(pipeline, src), caps = Gst.Caps.from_string("application/x-lal-snglinspiral"), name = "%s_sink_%d" % (instrument, n)) for instrument, srcs in triggersrc.items() for n, src in enumerate(srcs))
 	if options.verbose:
 		print >>sys.stderr, "attached %d, done" % len(appsinks)