Fixes test in run-medley for inferred medley directory (#793)

run-medley

@@ -27,7 +27,7 @@ fi
 
 if [ ! -d "$MEDLEYDIR/loadups" ] ; then
     echo "MEDLEYDIR has no loadups: $MEDLEYDIR"
-    if [ inferred_medleydir = true ] ; then
+    if [ $inferred_medleydir = true ] ; then
         echo "I tried to infer it based on your working directory, but that didn't work."
         echo "Try cd there or setting the MEDLEYDIR environment variable to its location."
     fi