MacOS: fix possible issue with fullscreen windows containing hidden subwindows

An error occurred with the tabs test program
- activate the last tab (containing 3 subwindows)
- activate another tab (the subwindows get hidden)
- set window fullscreen ===> the subwindows are visible and they should not
- reactivate the last tab ===> the subwindows are not where they should be

git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3-porting@12083 ea41ed52-d2ee-0310-a9c1-e6b18d33e121

1 files changed, 1 insertions, 1 deletions

diff --git a/src/Fl_cocoa.mm b/src/Fl_cocoa.mm
index 1a47a3aba..67cda04f7 100644
--- a/src/Fl_cocoa.mm
+++ b/src/Fl_cocoa.mm
@@ -1513,7 +1513,7 @@ static FLWindowDelegate *flwindowdelegate_instance = nil;
   int count = [windows count];
   for (int i = 0; i < count; i++) {
     NSWindow *win = [windows objectAtIndex:i];
-    if ([win isKindOfClass:[FLWindow class]] && ![win parentWindow]) {
+    if ([win isKindOfClass:[FLWindow class]] && ![win parentWindow] && [win isVisible]) {
       [[NSNotificationCenter defaultCenter] postNotificationName:NSWindowDidMoveNotification object:win];
       }
     }