ios: Include overlays in built app bundles.

Fix crash if the RetroArch.app/modules directory is missing or has no .dylib files inside.

ios/RetroArch.xcodeproj/project.pbxproj

@@ -18,6 +18,7 @@
 		96297A1D16C6D20900E6DCE0 /* settings_list.m in Sources */ = {isa = PBXBuildFile; fileRef = 96297A1C16C6D20900E6DCE0 /* settings_list.m */; };
 		96297A2416C818FF00E6DCE0 /* Icon-72.png in Resources */ = {isa = PBXBuildFile; fileRef = 96297A2216C818FF00E6DCE0 /* Icon-72.png */; };
 		96297A2516C818FF00E6DCE0 /* Icon.png in Resources */ = {isa = PBXBuildFile; fileRef = 96297A2316C818FF00E6DCE0 /* Icon.png */; };
+		96297A2716C82FF100E6DCE0 /* overlays in Resources */ = {isa = PBXBuildFile; fileRef = 96297A2616C82FF100E6DCE0 /* overlays */; };
 		96AFAE2A16C1D4EA009DE44C /* UIKit.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 96AFAE2916C1D4EA009DE44C /* UIKit.framework */; };
 		96AFAE2C16C1D4EA009DE44C /* Foundation.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 96AFAE2B16C1D4EA009DE44C /* Foundation.framework */; };
 		96AFAE2E16C1D4EA009DE44C /* CoreGraphics.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 96AFAE2D16C1D4EA009DE44C /* CoreGraphics.framework */; };
@@ -95,6 +96,7 @@
 		96297A1C16C6D20900E6DCE0 /* settings_list.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = settings_list.m; sourceTree = "<group>"; };
 		96297A2216C818FF00E6DCE0 /* Icon-72.png */ = {isa = PBXFileReference; lastKnownFileType = image.png; name = "Icon-72.png"; path = "RetroArch/Icon-72.png"; sourceTree = "<group>"; };
 		96297A2316C818FF00E6DCE0 /* Icon.png */ = {isa = PBXFileReference; lastKnownFileType = image.png; name = Icon.png; path = RetroArch/Icon.png; sourceTree = "<group>"; };
+		96297A2616C82FF100E6DCE0 /* overlays */ = {isa = PBXFileReference; lastKnownFileType = folder; name = overlays; path = ../media/overlays; sourceTree = "<group>"; };
 		96AFAE2516C1D4EA009DE44C /* RetroArch.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = RetroArch.app; sourceTree = BUILT_PRODUCTS_DIR; };
 		96AFAE2916C1D4EA009DE44C /* UIKit.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = UIKit.framework; path = System/Library/Frameworks/UIKit.framework; sourceTree = SDKROOT; };
 		96AFAE2B16C1D4EA009DE44C /* Foundation.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = Foundation.framework; path = System/Library/Frameworks/Foundation.framework; sourceTree = SDKROOT; };
@@ -300,6 +302,7 @@
 		96AFAE1A16C1D4EA009DE44C = {
 			isa = PBXGroup;
 			children = (
+				96297A2616C82FF100E6DCE0 /* overlays */,
 				96297A2216C818FF00E6DCE0 /* Icon-72.png */,
 				96297A2316C818FF00E6DCE0 /* Icon.png */,
 				962979F416C43B9500E6DCE0 /* ic_dir.png */,
@@ -722,6 +725,7 @@
 			isa = PBXResourcesBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
+				96297A2716C82FF100E6DCE0 /* overlays in Resources */,
 				96AFAE3816C1D4EA009DE44C /* InfoPlist.strings in Resources */,
 				96AFAE4016C1D4EA009DE44C /* Default.png in Resources */,
 				96AFAE4216C1D4EA009DE44C /* Default@2x.png in Resources */,

ios/RetroArch/module_list.m

@@ -6,6 +6,16 @@
 //  Copyright (c) 2013 RetroArch. All rights reserved.
 //
 
+static void display_error_alert(NSString* message)
+{
+   UIAlertView* alert = [[UIAlertView alloc] initWithTitle:@"RetroArch"
+                                             message:message
+                                             delegate:nil
+                                             cancelButtonTitle:@"OK"
+                                             otherButtonTitles:nil];
+   [alert show];
+}
+
 @implementation module_list
 {
    NSArray* modules;
@@ -21,8 +31,17 @@
                           @"modules"];
    
    modules = [[NSFileManager defaultManager] contentsOfDirectoryAtPath:module_dir error:nil];
-   modules = [module_dir stringsByAppendingPaths:modules];
+   
-   modules = [modules pathsMatchingExtensions:[NSArray arrayWithObject:@"dylib"]];
+   if (modules != nil)
+   {
+      modules = [module_dir stringsByAppendingPaths:modules];
+      modules = [modules pathsMatchingExtensions:[NSArray arrayWithObject:@"dylib"]];
+   }
+   
+   if (modules == nil || [modules count] == 0)
+   {
+      display_error_alert(@"No libretro cores were found.");
+   }
    
    [self setTitle:@"Choose Emulator"];
    self.navigationItem.rightBarButtonItem = [RetroArch_iOS get].settings_button;