remove unecessary bitfield from AquaSalFrame

it also makes GCC not complain as “trying to encode non-integer type as a bitfield”

Change-Id: I3330dd23a214c2a37814d02317b7a5ea252ff4af
Reviewed-on: https://gerrit.libreoffice.org/23563Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>

vcl/inc/osx/salframe.h

@@ -61,13 +61,13 @@ public:
     int                             mnMaxWidth;             // max. client width in pixels
     int                             mnMaxHeight;            // max. client height in pixels
     NSRect                          maFullScreenRect;       // old window size when in FullScreen
-    bool                            mbGraphics:1;           // is Graphics used?
-    bool                            mbFullScreen:1;         // is Window in FullScreen?
-    bool                            mbShown:1;
-    bool                            mbInitShow:1;
-    bool                            mbPositioned:1;
-    bool                            mbSized:1;
-    bool                            mbPresentation:1;
+    bool                            mbGraphics;             // is Graphics used?
+    bool                            mbFullScreen;           // is Window in FullScreen?
+    bool                            mbShown;
+    bool                            mbInitShow;
+    bool                            mbPositioned;
+    bool                            mbSized;
+    bool                            mbPresentation;
 
     SalFrameStyleFlags              mnStyle;
     unsigned int                    mnStyleMask;            // our style mask from NSWindow creation