pulse-server: add missing minus sign
Noticed by @QuLogic. (https://github.com/PipeWire/pipewire/commit/87c00a6f00eda6800915ab9f637c78a7d38b014d#r52380693)
Fixes: 87c00a6f ("pulse-server: add missing EWOULDBLOCK check")
Noticed by @QuLogic. (https://github.com/PipeWire/pipewire/commit/87c00a6f00eda6800915ab9f637c78a7d38b014d#r52380693)
Fixes: 87c00a6f ("pulse-server: add missing EWOULDBLOCK check")