MacGui: don't allow nil chapters titles.

diff --git a/macosx/HBChapter.m b/macosx/HBChapter.m
index 807309e138abee198c1242d84ff3ec6cb83d4e4f..67f72f334d32819f6c4abef0d5fa0095d07bce7b 100644 (file)
--- a/macosx/HBChapter.m
+++ b/macosx/HBChapter.m
@@ -39,7 +39,14 @@
     {
         [[self.undo prepareWithInvocationTarget:self] setTitle:_title];
     }
-    _title = title;
+    if (title == nil)
+    {
+        _title = @"";
+    }
+    else
+    {
+        _title = title;
+    }
 }
 
 #pragma mark - NSCopying