Prevent delegate auth from being used when running on main thread

Added a test for same

@@ -1453,6 +1453,11 @@ static NSRecursiveLock *delegateAuthenticationLock = nil;
 
 - (BOOL)askDelegateForProxyCredentials
 {
+	// Can't use delegate authentication when running on the main thread
+	if ([NSThread isMainThread]) {
+		return NO;
+	}
+	
 	// If we have a delegate, we'll see if it can handle proxyAuthenticationNeededForRequest:.
 	// Otherwise, we'll try the queue (if this request is part of one) and it will pass the message on to its own delegate
 	id authenticationDelegate = [self delegate];
@@ -1635,6 +1640,11 @@ static NSRecursiveLock *delegateAuthenticationLock = nil;
 
 - (BOOL)askDelegateForCredentials
 {
+	// Can't use delegate authentication when running on the main thread
+	if ([NSThread isMainThread]) {
+		return NO;
+	}
+	
 	// If we have a delegate, we'll see if it can handle proxyAuthenticationNeededForRequest:.
 	// Otherwise, we'll try the queue (if this request is part of one) and it will pass the message on to its own delegate
 	id authenticationDelegate = [self delegate];

@@ -39,4 +39,5 @@
 - (void)testTimeOutWithoutDownloadDelegate;
 - (void)testThrottlingDownloadBandwidth;
 - (void)testThrottlingUploadBandwidth;
+- (void)testMainThreadDelegateAuthenticationFailure;
 @end

@@ -857,6 +857,28 @@
 	
 }
 
+- (void)authenticationNeededForRequest:(ASIHTTPRequest *)request
+{
+	GHAssertTrue(NO,@"Delegate asked for authentication when running on the main thread");
+}
+
+- (void)testMainThreadDelegateAuthenticationFailure
+{
+	[ASIHTTPRequest clearSession];
+	//GHUnit will not run this function on the main thread, so we'll need to move it there
+	[self performSelectorOnMainThread:@selector(fetchOnMainThread) withObject:nil waitUntilDone:YES];
+		
+}
+
+- (void)fetchOnMainThread
+{
+	// Ensure the delegate is not called when we are running on the main thread
+	ASIHTTPRequest *request = [ASIHTTPRequest requestWithURL:[NSURL URLWithString:@"http://allseeing-i.com/ASIHTTPRequest/tests/basic-authentication"]];
+	[request setDelegate:self];
+	[request start];
+	GHAssertNotNil([request error],@"Failed to generate an authentication error");		
+}
+
 @end