catch and log a warning in RasterPlotter

source/net/yacy/visualization/RasterPlotter.java

@@ -165,6 +165,7 @@ public class RasterPlotter {
     public void plot(final int x, final int y, final int intensity) {
         if ((x < 0) || (x >= this.width)) return;
         if ((y < 0) || (y >= this.height)) return;
+        try {
         if (this.defaultMode == DrawMode.MODE_REPLACE) {
             if (intensity == 100) synchronized (this.cc) {
                 this.cc[0] = this.defaultColR;
@@ -215,6 +216,9 @@ public class RasterPlotter {
             }
             this.grid.setPixel(x, y, c);
         }
+        } catch (ArrayIndexOutOfBoundsException e) {
+            Log.logWarning("RasterPlotter", e.getMessage() + ": x = " + x + ", y = " + y);
+        } // may appear when pixel coordinate is out of bounds
     }
 
     public void line(final int Ax, final int Ay, final int Bx, final int By, final int intensity) {