Fix validation script to work with dash

sathieu · sathieu · commit 1f9931dbd245 · 2017-01-11T13:09:13.000+01:00
diff --git a/files/validate_postgresql_connection.sh b/files/validate_postgresql_connection.sh
@@ -26,7 +26,7 @@ do
   then
     exit 0
   fi
-$c++
+  c=$((c+1))
 done
 
 echo 'Unable to connect to postgresql'
