Merge pull request #115 from dotnetprojects/fixcurrentColor

currentColor default black,

Author: jogibear9988

Source/SVGImage/SVG/PaintServers/CurrentColorPaintServer.cs

@@ -12,7 +12,7 @@ public CurrentColorPaintServer(PaintServerManager owner)
 
         public override Brush GetBrush(double opacity, SVG svg, SVGRender svgRender, Rect bounds)
         {
-            return null;
+            return Brushes.Black;
         }
     }
 }