Font size appears to be 33% too big

[Nicjmit]

Was getting overlapping text in a pretty simple legend from ggplot:

After a bit of playing with the svg I found if you replaced the pt sizes with px instead it produced correctly sized text.

So just made the two following changes to get the output I was expecting:

double svg_strwidth(const char *str, const pGEcontext gc, pDevDesc dd) {
  // ... the rest
  return fm.width;//formerly * 96 / 72;
}

inline void write_style_fontsize(SvgStreamPtr stream, double value, bool first = false) {
  if(!first)  (*stream) << ' ';
  (*stream) << "font-size: " << value << "px;"; //formerly pt
}