start script fix (#16)

Author: FelixKirsch

start

@@ -6,7 +6,7 @@ docker stop refinery-weak-supervisor > /dev/null 2>&1
 echo -ne '\t [done]\n'
 
 INFERENCE_DIR=${PWD%/*}/dev-setup/inference/
-if [ ! -d "$_DIR" ] 
+if [ ! -d "$INFERENCE_DIR" ] 
 then
     INFERENCE_DIR=${PWD%/*/*}/dev-setup/inference/
     if [ ! -d "$INFERENCE_DIR" ]