MacGui: fix a crash in the preferences format field.

diff --git a/macosx/HBPreferencesController.m b/macosx/HBPreferencesController.m
index 14f988db6150452290f9e1db146e40cd45e37789..d125782bdd70776bae68d665a74ccfa7153c84f9 100644 (file)
--- a/macosx/HBPreferencesController.m
+++ b/macosx/HBPreferencesController.m
@@ -219,7 +219,7 @@
 
 - (NSString *)tokenField:(NSTokenField *)tokenField displayStringForRepresentedObject:(id)representedObject
 {
-    if ([representedObject rangeOfString: @"{"].location == 0)
+    if ([representedObject rangeOfString: @"{"].location == 0 && [representedObject length] > 1)
     {
         return [(NSString *)representedObject substringWithRange:NSMakeRange(1, [(NSString*)representedObject length]-2)];
     }