qt: fix crash when there is nothing to cache
On a fresh install of VLC compiler with mingw LLVM17 I get a crash when accessing m_cachedData. The pointer is NULL because the queryCount is 0.
On a fresh install of VLC compiler with mingw LLVM17 I get a crash when accessing m_cachedData. The pointer is NULL because the queryCount is 0.
VideoLAN code repository instance