gstlal-ugly/bin/gstlal_svd_bank_checkerboard: fix a typo in even configuration

gstlal-ugly/bin/gstlal_svd_bank_checkerboard

@@ -118,7 +118,7 @@ for bank_file in options.svd_files:
 			bank.sigmasq = bank.sigmasq[1::2]
 			bank.autocorrelation_bank = bank.autocorrelation_bank[1::2,:]
 			bank.autocorrelation_mask = bank.autocorrelation_mask[1::2,:]
-			bank.bank_correlation_matrix = bank_correlation_matrix[1::2,1::2]
+			bank.bank_correlation_matrix = bank.bank_correlation_matrix[1::2,1::2]
 		else:
 			bank.sigmasq = bank.sigmasq[0::2]
 			bank.autocorrelation_bank = bank.autocorrelation_bank[0::2,:]