The window will be resizable when zoom-to-fit is on.

Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
---
 ui/cocoa.m | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/ui/cocoa.m b/ui/cocoa.m
index 05c91e4eed53..cebfae04d9e8 100644
--- a/ui/cocoa.m
+++ b/ui/cocoa.m
@@ -1348,8 +1348,10 @@ - (void)zoomToFit:(id) sender
 {
     stretch_video = !stretch_video;
     if (stretch_video == true) {
+        [cocoaView window].styleMask |= NSWindowStyleMaskResizable;
         [sender setState: NSControlStateValueOn];
     } else {
+        [cocoaView window].styleMask &= ~NSWindowStyleMaskResizable;
         [cocoaView resizeWindow];
         [sender setState: NSControlStateValueOff];
     }
@@ -2002,6 +2004,7 @@ static void cocoa_display_init(DisplayState *ds, DisplayOptions *opts)
 
     if (opts->u.cocoa.has_zoom_to_fit && opts->u.cocoa.zoom_to_fit) {
         stretch_video = true;
+        [cocoaView window].styleMask |= NSWindowStyleMaskResizable;
     }
 
     create_initial_menus();

-- 
2.43.2