Fix help message

bin/installer-script.sh

@@ -1,11 +1,6 @@
 #!/usr/bin/env bash
 
 
-if [ -z "$1" ]; then
-  printHelp;
-  exit 1;
-fi
-
 appRoot=$(readlink -f $(dirname $(readlink -f $0))/.. );
 . "$appRoot/lib/installer_common";
 
@@ -44,6 +39,11 @@ installPackage(){
   mainInstaller;
 }
 
+if [ -z "$1" ]; then
+  printHelp;
+  exit 1;
+fi
+
 case $1 in
   update)
     updateSelf;