Dialog provider question triggers AppKit warning
2017-07-12 22:56:47.037283+0200 vlc-osx-static[41658:325083] [General] ERROR: Setting <NSButton: 0x10edf4bb0> as the first responder for window <NSPanel: 0x116665ab0>, but it is in a different window ((null))! This would eventually crash when the view is freed. The first responder will be set to nil.
(
0 AppKit 0x00007fffc9eaf9cf -[NSWindow _validateFirstResponder:] + 557
1 AppKit 0x00007fffc962a74c -[NSWindow _setFirstResponder:] + 31
2 AppKit 0x00007fffc96d29ce -[NSWindow _realMakeFirstResponder:] + 406
3 AppKit 0x00007fffc96d27e4 -[NSWindow makeFirstResponder:] + 123
4 AppKit 0x00007fffc97554c1 -[NSWindow _selectFirstKeyView] + 865
5 AppKit 0x00007fffc9755133 -[NSWindow _setUpFirstResponder] + 232
6 AppKit 0x00007fffc986c53f -[NSApplication _orderFrontModalWindow:relativeToWindow:] + 696
7 AppKit 0x00007fffc986bf1a -[NSApplication _commonBeginModalSessionForWindow:relativeToWindow:modalDelegate:didEndSelector:contextInfo:] + 629
8 AppKit 0x00007fffc986bc9f -[NSApplication beginModalSessionForWindow:] + 37
9 AppKit 0x00007fffc9a4e35b __35-[NSApplication runModalForWindow:]_block_invoke + 39
10 AppKit 0x00007fffc986bb98 -[NSApplication runModalForWindow:] + 137
11 AppKit 0x00007fffc9a3e23d __19-[NSAlert runModal]_block_invoke + 158
12 AppKit 0x00007fffc98e411c -[NSAlert runModal] + 125
13 libmacosx_plugin.dylib 0x00000001057f7d7a -[VLCCoreDialogProvider displayQuestion:] + 410
)