Fixed bug in Slurm wrapper script.

An 'if' condition was backwards.

slurm-wrapper.sh

@@ -74,7 +74,7 @@ if [ "$SLURM_LOCALID" == "0" ] ; then
 		${CUDADL_PATH}/dpnode $IP $PORT > "${OUTPUT_FILE}" 2>&1
 	fi
 	#
-	if [ -z "$CONTROLLER_PID" ] ; then
+	if [ ! -z "$CONTROLLER_PID" ] ; then
 		wait "$CONTROLLER_PID"
 	fi
 else