Make sure that *m_twinSpacer is iniitialized in panelspacer
This fixes a segfault of panelspacer on musl and 32bit glibc systems.
Realted bug report: https://bugs.kde.org/show_bug.cgi?id=422914
This fixes a segfault of panelspacer on musl and 32bit glibc systems.
Realted bug report: https://bugs.kde.org/show_bug.cgi?id=422914