Don't use inactive borders for spinbox on Mac

This was probably caused by the fact that the only spinbox
visible in the main control panel has an inactive frame border.
In XCode 4, however the spin buttons are generally attached
to an active lineedit frame, so we change the default for 4.8.

Reviewed-by: gabriel
(cherry picked from commit 6c9d808c5726893e9aa673ca8b0cbebae67f641c)

src/gui/styles/qmacstyle_mac.mm

@@ -4707,7 +4707,7 @@ void QMacStyle::drawComplexControl(ComplexControl cc, const QStyleOptionComplex
 
                 HIThemeFrameDrawInfo fdi;
                 fdi.version = qt_mac_hitheme_version;
-                fdi.state = kThemeStateInactive;
+                fdi.state = tds;
                 fdi.kind = kHIThemeFrameTextFieldSquare;
                 fdi.isFocused = false;
                 HIRect hirect = qt_hirectForQRect(lineeditRect);