Fail gracefully when attempting to download to an invalid local path

@@ -2218,7 +2218,9 @@ static NSRecursiveLock *delegateAuthenticationLock = nil;
 + (int)uncompressZippedDataFromFile:(NSString *)sourcePath toFile:(NSString *)destinationPath
 {
 	// Create an empty file at the destination path
-	[[NSFileManager defaultManager] createFileAtPath:destinationPath contents:[NSData data] attributes:nil];
+	if (![[NSFileManager defaultManager] createFileAtPath:destinationPath contents:[NSData data] attributes:nil]) {
+		return 1;
+	}
 	
 	// Get a FILE struct for the source file
 	NSFileHandle *inputFileHandle = [NSFileHandle fileHandleForReadingAtPath:sourcePath];

@@ -879,6 +879,21 @@
 	GHAssertNotNil([request error],@"Failed to generate an authentication error");		
 }
 
+- (void)testFetchToInvalidPath
+{
+	// Test gzipped content
+	ASIHTTPRequest *request = [ASIHTTPRequest requestWithURL:[NSURL	URLWithString:@"http://allseeing-i.com"]];
+	[request setDownloadDestinationPath:@"/an/invalid/location.html"];
+	[request start];
+	GHAssertNotNil([request error],@"Failed to generate an authentication when attempting to write to an invalid location");	
+	
+	//Test non-gzipped content
+	request = [ASIHTTPRequest requestWithURL:[NSURL	URLWithString:@"http://allseeing-i.com/i/logo.png"]];
+	[request setDownloadDestinationPath:@"/an/invalid/location.png"];
+	[request start];
+	GHAssertNotNil([request error],@"Failed to generate an authentication when attempting to write to an invalid location");		
+}
+
 @end