OS slackware 11 で

$:~/jnethack-1.1.5$ make all
( cd src ; make )
make[1]: Entering directory `/home/umiboz/jnethack-1.1.5/src'
gcc -O3 -Wall -I../include -I/usr/X11R6/include `gtk-config --cflags` -c ../extension/extension.c
../extension/extension.c: In function `report_score':
../extension/extension.c:245: error: label at end of compound statement
../extension/extension.c: In function `send_bones':
../extension/extension.c:331: error: label at end of compound statement
make[1]: *** [extension.o] Error 1
make[1]: Leaving directory `/home/umiboz/jnethack-1.1.5/src'
make: *** [jnethack] Error 2
~/jnethack-1.1.5

エラーの回避しかた、教えてください。よろしくお願いします。