Added error messages for entries whose properties cannot be read. Fixed length in such cases to not show up.

Playlist/PlaylistEntry.m

@@ -54,7 +54,13 @@
 - (void)readPropertiesThread
 {
 	NSDictionary *properties = [AudioPropertiesReader propertiesForURL:self.URL];
+	if (!properties) {
+		[self setStatus:[NSNumber numberWithInteger:kCogEntryError]];
+		[self setStatusMessage:@"Failed to read properties!"];
 
+		return;
+	}
+	
 	[self performSelectorOnMainThread:@selector(setProperties:) withObject:properties waitUntilDone:YES];
 }
 

Playlist/SecondsFormatter.m

@@ -31,7 +31,7 @@
 	unsigned		minutes			= 0;
 	unsigned		seconds			= 0;
 	
-	if(nil == object || NO == [object isKindOfClass:[NSNumber class]]) {
+	if(nil == object || NO == [object isKindOfClass:[NSNumber class]] || isnan([object doubleValue])) {
 		return nil;
 	}