Update 12_Drop.js

fixed a print statement that was old Java code

Author: talmrobinson

src/data/examples/en/16_Dom/12_Drop.js

@@ -31,6 +31,6 @@ function gotFile(file) {
     // Draw the image onto the canvas
     image(img, 0, 0, width, height);
   } else {
-    println('Not an image file!');
+    console.log('Not an image file!');
   }
-}
+}