fixed error message bug

rules.txt

     5   10  16
 5   0.6	0.2	0.2
-10  0.2 0.6 0.2
+10  0.6 0.2 0.2
 16  0.2 0.2 0.6

scripts/rules_gen.py

@@ -25,7 +25,7 @@ def error(message):
 	print
 	print "ERROR", message
 	print
-	sys.exit()
+	sys.exit(1)
 
 def extract_words(line):
 	return filter(lambda x: x.strip(),
@@ -100,8 +100,8 @@ while i<len(lines):
 for s0 in range(256):
 	sum_prob=reduce(lambda x, y: x+y, [rules[s0][s1] for s1 in rules[s0]])
 	if sum_prob!=1:
-		error("Normalization fails for state (" + s0 + "), sum prob is "
-			+ str(sum_prob))
+		error("Normalization fails for state (" + str(s0) +\
+			"), sum prob is " + str(sum_prob))
 
 # generate code
 try: