Merge pull request #454 from Sonicadvance1/fix-android-crash

[Android] Fix potential crash in Video Settings.

Source/Android/src/org/dolphinemu/dolphinemu/settings/video/VideoSettingsFragment.java

@@ -63,24 +63,29 @@ public void onCreate(Bundle savedInstanceState)
 		//
 		// Set available post processing shaders
 		//
-		File[] shaders = new File(Environment.getExternalStorageDirectory()+ File.separator+"dolphin-emu"+ File.separator+"Shaders").listFiles();
+
 		List<CharSequence> shader_names = new ArrayList<CharSequence>();
 		List<CharSequence> shader_values = new ArrayList<CharSequence>();
 
 		// Disabled option
 		shader_names.add("Disabled");
 		shader_values.add("");
 
-		for (File file : shaders)
+		File shaders_folder = new File(Environment.getExternalStorageDirectory()+ File.separator+"dolphin-emu"+ File.separator+"Shaders");
+		if (shaders_folder.exists())
 		{
-			if (file.isFile())
+			File[] shaders = shaders_folder.listFiles();
+			for (File file : shaders)
 			{
-				String filename = file.getName();
-				if (filename.contains(".glsl"))
+				if (file.isFile())
 				{
-					// Strip the extension and put it in to the list
-					shader_names.add(filename.substring(0, filename.lastIndexOf('.')));
-					shader_values.add(filename.substring(0, filename.lastIndexOf('.')));
+					String filename = file.getName();
+					if (filename.contains(".glsl"))
+					{
+						// Strip the extension and put it in to the list
+						shader_names.add(filename.substring(0, filename.lastIndexOf('.')));
+						shader_values.add(filename.substring(0, filename.lastIndexOf('.')));
+					}
 				}
 			}
 		}