Win32: properly retain and free class name, better name
Win32: properly retain and free class name, better name

DanielAeolusLaude/DPF,DISTRHO/DPF,DISTRHO/DPF,DanielAeolusLaude/DPF,DanielAeolusLaude/DPF,DanielAeolusLaude/DPF,DISTRHO/DPF,DISTRHO/DPF