x11/fnott: apply upstream crashfix

$ fnott &
warn: config.c:627: no configuration found, using defaults
info: wayland.c:713: DP-1: 3840x2160+0x0@60Hz LG Ultra HD 27.15" scale=1 PPI=166x166 (physical) PPI=166x166 (logical)

$ notify-send "this is the summary" "this is the body"
info: fcft.c:256: fcft: 2.3.2 +graphemes
info: fcft.c:266: fontconfig: 2.13.92
info: fcft.c:272: freetype: 2.10.4
info: fcft.c:717: /usr/local/share/fonts/dejavu/DejaVuSans.ttf: size=12.00pt/27px, dpi=166.00
info: fcft.c:717: /usr/local/share/fonts/dejavu/DejaVuSans-Bold.ttf: size=12.00pt/27px, dpi=166.00
info: fcft.c:717: /usr/local/share/fonts/dejavu/DejaVuSans-Oblique.ttf: size=12.00pt/27px, dpi=166.00
info: fcft.c:717: /usr/local/share/fonts/dejavu/DejaVuSans-BoldOblique.ttf: size=12.00pt/27px, dpi=166.00

$ fnottctl dismiss
err: ctrl.c:104: client: FD=7: failed to receive command: Resource temporarily unavailable
warn: fdm.c:57: FD list not empty
Assertion failed: (fcCacheChains[i] == NULL), function FcCacheFini, file fccache.c, line 807.