altos: create target pdclib directories before building

[fw/altos] / altosui / AltosSiteMapCache.java

diff --git a/altosui/AltosSiteMapCache.java b/altosui/AltosSiteMapCache.java
index 617ed4a9a3331193271b03f4dd4b56b6eb406eb3..40c8ff6bf0dc078beff6f8b5016f8910ffe2f4c4 100644 (file)
--- a/altosui/AltosSiteMapCache.java
+++ b/altosui/AltosSiteMapCache.java
@@ -19,6 +19,7 @@ package altosui;
 
 import javax.swing.*;
 import javax.imageio.ImageIO;
+import java.awt.image.*;
 import java.io.*;
 import java.net.URL;
 import java.net.URLConnection;
@@ -87,7 +88,14 @@ public class AltosSiteMapCache extends JLabel {
                }
 
                try {
-                       return new ImageIcon(ImageIO.read(pngfile));
+                       BufferedImage   img;
+
+                       img = ImageIO.read(pngfile);
+                       if (img == null) {
+                               System.out.printf("# Can't read pngfile %s\n", pngfile);
+                               return null;
+                       }
+                       return new ImageIcon(img);
                } catch (IOException e) {
                        System.out.printf("# IO error trying to load %s\n", pngfile);
                        return null;