Fix in setSvgString() for images with no href (images in pattern#gridpattern don't seem to have them)
Fix in setSvgString() for images with no href (images in pattern#gridpattern don't seem to have them)

git-svn-id: e52e7dec99011c9686d89c3d3c01e7ff0d333eee@2497 eee81c28-f429-11dd-99c0-75d572ba1ddd

tremez/svgedit,centaurustech/svgedit,tremez/svgedit,laddhoffman/svgedit,ubbn/svgedit,BakerSky/svgedit,mynext/svgedit,SVG-Edit/svgedit,beavis28/svgedit,thewenneur/svgedit,ubbn/svgedit,laddhoffman/svgedit,BakerSky/svgedit,thewenneur/svgedit,tremez/svgedit,uche40/svgedit,beavis28/svgedit,progers/svgedit,ubbn/svgedit,centaurustech/svgedit,progers/svgedit,tremez/svgedit,bartuspan/svgedit,progers/svgedit,uche40/svgedit,laddhoffman/svgedit,progers/svgedit,laddhoffman/svgedit,SVG-Edit/svgedit,SVG-Edit/svgedit,beavis28/svgedit,centaurustech/svgedit,uche40/svgedit,bartuspan/svgedit,uche40/svgedit,beavis28/svgedit,thewenneur/svgedit,mynext/svgedit,BakerSky/svgedit,ubbn/svgedit,mynext/svgedit,bartuspan/svgedit,mynext/svgedit,bartuspan/svgedit,centaurustech/svgedit,BakerSky/svgedit,thewenneur/svgedit