No real changes, just make some wxSlider members local variables.

wxMSW wxSlider implementation stored the min and max labels widths as fields
of wxSlider object for some reason even though they were only used in one of
its methods (and can be easily computed anyhow).

Make them simple local variables instead and also rename an existing local
variable which started conflicting with their new names.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@68229 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/msw/slider.h

@@ -123,8 +123,6 @@ protected:
     int           m_pageSize;
     int           m_lineSize;
     int           m_tickFreq;
-    int           m_minLabelWidth;
-    int           m_maxLabelWidth;
 
     // flag needed to detect whether we're getting THUMBRELEASE event because
     // of dragging the thumb or scrolling the mouse wheel