SVG backing is now a C++ object.

src/svg.cc

@@ -30,13 +30,13 @@
 #define NANOSVGRAST_IMPLEMENTATION
 #include "nanosvgrast.h"
 
-typedef struct {
+struct DilloSvg {
    DilloImage *Image;           /* Image meta data */
    DilloUrl *url;               /* Primary Key for the dicache */
    int version;                 /* Secondary Key for the dicache */
    int bgcolor;                 /* Parent widget background color */
    int fgcolor;                 /* Parent widget foreground color */
-} DilloSvg;
+};
 
 /*
  * Free up the resources for this image.
@@ -45,7 +45,7 @@ static void Svg_free(DilloSvg *svg)
 {
    _MSG("Svg_free: svg=%p\n", svg);
 
-   dFree(svg);
+   delete svg;
 }
 
 /*
@@ -153,7 +153,7 @@ extern "C" void a_Svg_callback(int Op, CacheClient_t *data)
  */
 void *a_Svg_new(DilloImage *Image, DilloUrl *url, int version)
 {
-   DilloSvg *svg = dNew0(DilloSvg, 1);
+   DilloSvg *svg = std::make_unique< DilloSvg >().release();
    _MSG("a_Svg_new: svg=%p\n", svg);
 
    svg->Image = Image;