updated pixelWidth/Height in resize()

Author: codeanticode

core/src/processing/core/PImage.java

@@ -396,6 +396,8 @@ public void resize(int w, int h) {  // ignore
     }
     this.width = w;
     this.height = h;
+    this.pixelWidth = w * pixelDensity;
+    this.pixelHeight = h * pixelDensity;
   }