gstlal-inspiral/bin/gstlal_add_spins_to_bank: force body 1 to be the lighter body by convention

gstlal-inspiral/bin/gstlal_add_spins_to_bank

@@ -31,8 +31,8 @@ def parse_command_line():
 	parser = OptionParser()
 	parser.add_option("--output", metavar = "file", default = ".", help = "Set the name of the output file")
 	parser.add_option("--input", metavar = "file", default = ".", help = "Set the name of the input file")
-	parser.add_option("--spin1z", action="append", help="values of spin1z to populate, give multiple times")
-	parser.add_option("--spin2z", action="append", help="values of spin2z to populate, give multiple times")
+	parser.add_option("--spin1z", action="append", help="values of spin1z to populate, give multiple times: convention body 1 is the lighter body")
+	parser.add_option("--spin2z", action="append", help="values of spin2z to populate, give multiple times: convention body 1 is the lighter body")
 	parser.add_option("--approximant", help = "override approximant with this value")
 	parser.add_option("-v", "--verbose", action = "store_true", help = "Be verbose.")
 	options, filenames = parser.parse_args()
@@ -57,7 +57,10 @@ new_rows = []
 for row in sngl_inspiral_table:
 	for spin1z in options.spin1z:
 		for spin2z in options.spin2z:
-		#FIXME populate the ending frequency
+			#FIXME populate the ending frequency
+			# swap masses to obey mass 1 is the lighter body 
+			if row.mass1 > row.mass2:
+				row.mass1, row.mass2 = row.mass2, row.mass1
 			row.spin1z=float(spin1z)
 			row.spin2z=float(spin2z)
 			new_rows.append(copy.deepcopy(row))