...and use it in one place for the experimental Emscripten Qt6 JSPI/non-PROXY_TO_PTHREAD mode (where I have a hunch that some of the deadlocks I experience in that experimental mode are due to a mis-locked SolarMutex) Change-Id: Ifb335202569b7d2beecd7a502064ebcfdaaddbab Reviewed-on: https://gerrit.libreoffice.org/c/core/+/181872 Tested-by: Jenkins Reviewed-by: Stephan Bergmann <stephan.bergmann@allotropia.de>