qmacstyle_mac.mm fails to compile with 32-bit mkspec

....
/SDKs/MacOSX10.9.sdk/System/Library/Frameworks/OpenGL.framework/Versions/A/Headers -I/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk/System/Library/Frameworks/AGL.framework/Headers -F/Users/bertus/Projects/email_designer/lib/vendor/qt/5.4.0/qtbase/lib widgets/qmenu_mac.mm -o .obj/debug/qmenu_mac.o
styles/qmacstyle_mac.mm:5575:72: error: no viable conversion from 'const HIRect' (aka 'const CGRect') to 'NSRect' (aka '_NSRect')
                                                [sl.cell drawBarInside:tdi.bounds flipped:NO];
                                                                       ^~~~~~~~~~
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSGeometry.h:60:16: note: candidate constructor (the implicit copy constructor) not viable: no known conversion from 'const HIRect' (aka 'const CGRect') to 'const _NSRect &' for 1st argument
typedef struct _NSRect {
               ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSGeometry.h:60:16: note: candidate constructor (the implicit move constructor) not viable: no known conversion from 'const HIRect' (aka 'const CGRect') to '_NSRect &&' for 1st argument
typedef struct _NSRect {
               ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk/System/Library/Frameworks/AppKit.framework/Headers/NSSliderCell.h:67:31: note: passing argument to parameter 'aRect' here
- (void)drawBarInside:(NSRect)aRect flipped:(BOOL)flipped;
....

[sl.cell drawBarInside:tdi.bounds flipped:NO];

[sl.cell drawBarInside:NSRectFromCGRect(tdi.bounds) flipped:NO];