Throw SVGException instead of IAE

We have upgraded to version 1.1.0 in JOSM: https://josm.openstreetmap.de/changeset/10787/josm The switch from batik to Java2D API now detects more invalid cases. For example, we have two SVG files which were previously loaded and now cause errors:

https://josm.openstreetmap.de/browser/josm/trunk/images/presets/sport/volleyball.svg?rev=10706 https://josm.openstreetmap.de/browser/josm/trunk/images/presets/shop/diy_store.svg?rev=10706

The error are: java.lang.IllegalArgumentException: Keyframe fractions must be increasing: 1.0 java.lang.IllegalArgumentException: Keyframe fractions must be increasing: 0.5

They match the following SVG code:

<linearGradient
   id="linearGradient1879">
  <stop
     id="stop1880"
     offset="0.0000000"
     style="stop-color:#002723;stop-opacity:1.0000000;" />
  <stop
     id="stop1883"
     offset="1.0000000"
     style="stop-color:#000000;stop-opacity:0.49803922;" />
  <stop
     id="stop1881"
     offset="1.0000000"
     style="stop-color:#ffffff;stop-opacity:0.0000000;" />
</linearGradient>

and

<linearGradient
   id="linearGradient8962">
  <stop
     id="stop8964"
     offset="0.00000000"
     style="stop-color:#fffdff;stop-opacity:1.0000000;" />
  <stop
     id="stop8970"
     offset="0.50000000"
     style="stop-color:#000000;stop-opacity:0.49803922;" />
  <stop
     id="stop8972"
     offset="0.50000000"
     style="stop-color:#000000;stop-opacity:0.24705882;" />
  <stop
     id="stop8966"
     offset="1"
     style="stop-color:#000000;stop-opacity:0;" />
</linearGradient>

The offsets are not strictly increasing.

blackears / svgSalamander

Throw SVGException instead of IAE #4