Wrong offset calculation (#1246)

Author: pl752

src/FirebirdSql.Data.FirebirdClient/Client/Managed/FirebirdNetworkHandlingWrapper.cs

@@ -122,12 +122,12 @@ public async ValueTask<int> ReadAsync(byte[] buffer, int offset, int count, Canc
 
 	public void Write(byte[] buffer, int offset, int count)
 	{
-		for (var i = offset; i < count; i++)
+		for (var i = 0; i < count; i++)
 			_outputBuffer.Enqueue(buffer[offset + i]);
 	}
 	public ValueTask WriteAsync(byte[] buffer, int offset, int count, CancellationToken cancellationToken = default)
 	{
-		for (var i = offset; i < count; i++)
+		for (var i = 0; i < count; i++)
 			_outputBuffer.Enqueue(buffer[offset + i]);
 		return ValueTask.CompletedTask;
 	}