Crash when using with SVG files

[Miguel Gimenez]

I am adapting the code to HiDPI after wx3.1.6 using wxBitmapBundle (see ticket #1297 for details), and I have discovered that wxBitmapBundle::FromSVG() method produces random crashes because the underlying library (nanoSVG) is buggy:
  - first crash is in nsvg_Parse(). This only happens on non-english locales, is fixed in nanoSVG trunk but not in wxWidgets, and a workaround is locale switching before calling FromSVG().
  - second crash is in nsvg__addEdge(). AFAIK this is not fixed and there is no workaround.

Because of this, I will temporarily remove calls to wxBitmapBundle::FromSVG() along this weekend.

[AndrewCot]

Straight up: I am not happy with the process used and the way the SVN changes have been made.
Going forward:
 Can a new interface be added so that the changes in the vast majority of code calls one function/class and this class/function has the smarts to either use the existing PNG or the new SVG files. This has the advantage on only modifying the existing code:

• Once
• Allows for the removal of the PNG support without changing the C::B source files
• updates as needed without modifying the existing C::B code after the initial change.
• Existing C::B code does not have any #if..#else..#endif block

[gd_on]

In my own software, I use wxBitmapBundle::FromSVGFile() in wxWidgets 3.2.1 and never met such problems (until now )

[Miguel Gimenez]

It was a misunderstanfing on my side, it is fixed now.

[ollydbg]

It was a misunderstanfing on my side, it is fixed now.

Good work.