logic fix

src/tabbed_chat_window.py

@@ -757,7 +757,9 @@ timestamp, contact):
 			pos = pos + 1
 
 			# line is [] if log file for jid is not a file (does not exist or dir)
-			if line != []:
+			if line == []:
+				break
+			
 			if (now - float(line[0][0]))/60 >= time_out:
 				# stop looking for messages if we found something too old
 				break
@@ -769,6 +771,7 @@ timestamp, contact):
 				lines.append(line[0])
 				size = size + 1
 	
+		if lines != []:
 			lines.reverse()
 		
 		for msg in lines: