Enlarge probe version field

Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/server.c b/server.c
index f1c69dd..456c88c 100644
--- a/server.c
+++ b/server.c
@@ -622,7 +622,7 @@
 #ifdef FIO_BIG_ENDIAN
 	probe.bigendian = 1;
 #endif
-	strcpy((char *) probe.fio_version, fio_version_string);
+	strncpy((char *) probe.fio_version, fio_version_string, sizeof(probe.fio_version));
 
 	probe.os	= FIO_OS;
 	probe.arch	= FIO_ARCH;