ignore empty lines, ignore missing files

tools/coldstore.py

@@ -48,9 +48,15 @@ def SameScore(a, b):
 
 def LoadRecordsFromFile(path):
 	records = []
-	with open(path, "r") as f:
-		for line in f.readlines():
-			records.append(ParseScore(line.strip()))
+	try:
+		with open(path, "r") as f:
+			for line in f.readlines():
+				line = line.strip()
+				if line != "":
+					records.append(ParseScore(line))
+	except FileNotFoundError:
+		pass
+
 	return records
 
 def AddScore(records, score):