wmstartup.sh: Better baseball bat and break code

.config/dtfscripts/wmstartup.sh

@@ -71,7 +71,8 @@ for service in $services; do
 	while pgrep $service > /dev/null 2>&1; do
 		if [[ "$i" = "10" ]]; then
 			printf "  [INFO] Waited too long, killing $service with prejudice\n"
-			killall -9 $service
+			pkill -9 $service
+			break
 		else
 			printf "  [INFO] Waiting on $service\n"
 			sleep 0.5