Ensure ‘new_mode’ is initialized; fixes compiler warning wlopm.c: In function ‘sync_handle_done’: wlr-output-power-management-unstable-v1.h:295:9: error: ‘new_mode’ may be used uninitialized in this function [-Werror=maybe-uninitialized] 295 | wl_proxy_marshal((struct wl_proxy *) zwlr_output_power_v1, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 296 | ZWLR_OUTPUT_POWER_V1_SET_MODE, mode); | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ wlopm.c:178:40: note: ‘new_mode’ was declared here 178 | enum zwlr_output_power_v1_mode new_mode; | ^~~~~~~~