Merge pull request #606 from dpvc/issue604

Make sure TeXmathchoice saves the SVG data for its core.  Resolves issue...

Author: fred-wang

unpacked/extensions/TeX/mathchoice.js

@@ -75,7 +75,11 @@ MathJax.Hub.Register.StartupHook("TeX Jax Ready",function () {
       }
       return span;
     },
-    toSVG: function () {return this.Core().toSVG()}
+    toSVG: function () {
+      var svg = this.Core().toSVG();
+      this.SVGsaveData(svg);
+      return svg;
+    }
   });
 
   MathJax.Hub.Startup.signal.Post("TeX mathchoice Ready");