Allowed host applications that include Sparkle 1.5 or greater to once…

… again allow Sparkle updating of ClickToFlash

Signed-off-by: Jonathan 'Wolf' Rentzsch <jwr.git@redshed.net>

SparkleManager.m

@@ -43,8 +43,7 @@ + (id)sharedManager {
 - (id)init {
     self = [super init];
     if (self) {
-        // We can try to update is Sparkle isn't already loaded in our host.
-        _canUpdate = !objc_getClass("SUUpdater");
+        _canUpdate = NO;
     }
     return self;
 }
@@ -62,8 +61,6 @@ - (SUUpdater*)_updater {
     if (_updater)
         return _updater;
 
-    NSAssert(_canUpdate, nil);
-
     NSString *frameworksPath = [[NSBundle bundleForClass:[self class]] privateFrameworksPath];
     NSAssert(frameworksPath, nil);
 
@@ -82,10 +79,13 @@ - (SUUpdater*)_updater {
         Class updaterClass = objc_getClass("SUUpdater");
         NSAssert(updaterClass, nil);
 
-        _updater = [updaterClass updaterForBundle:clickToFlashBundle];
-        NSAssert(_updater, nil);
-
-        [_updater setDelegate:self];
+		if ([updaterClass respondsToSelector:@selector(updaterForBundle:)]) {
+			_canUpdate = YES;
+			_updater = [updaterClass updaterForBundle:clickToFlashBundle];
+			NSAssert(_updater, nil);
+
+			[_updater setDelegate:self];
+		}
     }
 
     if (error) NSLog(@"error loading ClickToFlash's Sparkle: %@", error);
@@ -103,8 +103,8 @@ - (void)startAutomaticallyCheckingForUpdates {
         if (!checkedForUpdate) {
             checkedForUpdate = YES;
 
+			SUUpdater *updater = [self _updater];
             if (_canUpdate) {
-                SUUpdater *updater = [self _updater];
                 [updater checkForUpdatesInBackground];
                 [updater setAutomaticallyChecksForUpdates:YES];
             }