Rounding

[ABX]

Hi all!

At tinderbox there is error:
http://signwriting.sourceforge.net/wxLogs/?log=logs.cf/HEAD-wxGTK-i386-pc-solaris2.9.err&id=6-3-18-40
wx/src/gtk/slider.cpp:137: error: `round' undeclared (first use this function)

This slider.cpp file contains at the top:

  #ifdef __VMS
     //Missing definition in OpenVMS C++ header files.
     double round(double __x);
  #endif

which means there is already one platform with round problem and tinderbox is
the other. In gtk1/slider.cpp file however there is:

  static inline int AdjustValueToInt(double x)
  {
      // we want to round to the nearest integer, i.e. 0.9 is rounded to 1 and
      // -0.9 is rounded to -1
      return (int)(x < 0 ? x - 0.5 : x + 0.5);
  }

and in motif/gauge.cpp there is:

  #define round(x) ( (x) > 0 ? ((x) + 0.5) : -(-(x) + 0.5) )

This variety made me thing that it would be better to centralize this as
  int wxRound(double);
function which hides all the portability problems. Anybody against?

ABX