[Android] Fix a situation within the FolderBrowser where the application would crash. listFiles() returns null when either the File object it's called on isn't a directory or if an I/O error happens (in their infinite wisdom, they actually thought NOT throwing an exception was a cool way to handle this. How about that?). In the case of trying to access system directories as a normal user, an I/O error will occur due to permission access rights. This fixes that.

Source/Android/src/org/dolphinemu/dolphinemu/folderbrowser/FolderBrowser.java

@@ -54,6 +54,9 @@ public final class FolderBrowser extends ListFragment
 		// Supported extensions to filter by
 		Set<String> validExts = new HashSet<String>(Arrays.asList(".dff", ".dol", ".elf", ".gcm", ".gcz", ".iso", ".wad", ".wbfs"));
 
+		// If dirs is null, then we don't have access permissions to the selected folder.
+		if (dirs != null)
+		{
 			// Search for any directories or files within the current dir.
 			for(File entry : dirs)
 			{
@@ -83,6 +86,7 @@ public final class FolderBrowser extends ListFragment
 					Log.e("FolderBrowser", ex.toString());
 				}
 			}
+		}
 
 		Collections.sort(dir);
 		Collections.sort(fls);