am e8bb54b5: Merge change 23595 into eclair

Merge commit 'e8bb54b5b79816b43d9d1652d3dac9dc7b3d7e2d' into eclair-plus-aosp

* commit 'e8bb54b5b79816b43d9d1652d3dac9dc7b3d7e2d':
  fixing NPE that i see on my Mac when running idegen.sh

tools/idegen/src/Configuration.java

@@ -123,7 +123,11 @@ public class Configuration {
          */
 
         boolean firstJavaFile = true;
-        for (File file : directory.listFiles()) {
+	File[] files = directory.listFiles();
+	if (files == null) {
+	    return;
+	}
+        for (File file : files) {
             // Trim preceding "./" from path.
             String path = file.getPath().substring(2);