SDGallery:Fix monkey FC when url from pick activity is null

if url in data of activityResult is null, don't load image

Change-Id: I103d1d431075483ef7cdce1a2bbd6459da69afdc
diff --git a/src/com/android/gallery3d/filtershow/FilterShowActivity.java b/src/com/android/gallery3d/filtershow/FilterShowActivity.java
index 5c289ce..7fad956 100755
--- a/src/com/android/gallery3d/filtershow/FilterShowActivity.java
+++ b/src/com/android/gallery3d/filtershow/FilterShowActivity.java
@@ -2549,7 +2549,9 @@
         if (resultCode == RESULT_OK) {
             if (requestCode == SELECT_PICTURE) {
                 Uri selectedImageUri = data.getData();
-                startLoadBitmap(selectedImageUri);
+                if (selectedImageUri != null) {
+                    startLoadBitmap(selectedImageUri);
+                }
             } else if (requestCode == SELECT_FUSION_UNDERLAY) {
                 Uri underlayImageUri = data.getData();
                 // find fusion representation