Correct generate_tiles in run.sh for dealing with the lang argument

run.sh

@@ -150,7 +150,7 @@ if [ "$1" == "run" ]; then
     # Clean /tmp
     rm -rf /tmp/*
 
-    if [ -z "$2" ]; then
+    if [ "$#" -gt 1 ]; then
         compileStyle $2
     else
         compileStyle
@@ -220,7 +220,7 @@ fi
 
 if [ "$1" == "generate_tiles" ]; then
 
-    if [ -z "$2" ]; then
+    if [ "$#" -gt 1 ]; then
         compileStyle $2
     else
         compileStyle
@@ -231,15 +231,16 @@ if [ "$1" == "generate_tiles" ]; then
 
     sudo -u renderer renderd -c /etc/renderd.conf
 
-    if [ -z "$2" ]; then
-        render_list --map osmbe -n 36 --min-zoom=0 --max-zoom=7 --all
-        cat /data/tiles/osmbe/tiles.list | render_list --map osmbe -n 36
-        bash
-
+    if [ "$#" -gt 1 ]; then
         render_list --map osmbe_${$2} -n 36 --min-zoom=0 --max-zoom=7 --all
         cat /data/tiles/osmbe/tiles.list | render_list --map osmbe_${$2} -n 36
         bash
+    else
+        render_list --map osmbe -n 36 --min-zoom=0 --max-zoom=7 --all
+        cat /data/tiles/osmbe/tiles.list | render_list --map osmbe -n 36
+        bash
+    fi
 fi
 
-echo "invalid command"
-exit 1
+# echo "invalid command"
+# exit 1