svd_bank.py: fix a bug that causes the wrong template id to be used when reading svd bank file.

gstlal-inspiral/python/svd_bank.py

@@ -509,6 +509,7 @@ def read_banks(filename, contenthandler, verbose = False):
 
 		banks.append(bank)
 	template_id, func = horizon_distance_func(banks)
+	template_id = abs(template_id) # make sure horizon_distance_func did not pick the noise model template
 	horizon_norm = None
 	for bank in banks:
 		if template_id in bank.horizon_factors and bank.bank_type == "signal_model":