scripts/hook in rvm-1.0.2 vs scripts/hook in rvm-1.0.3

@@ -1,10 +1,14 @@
 #!/usr/bin/env bash
 
-if [[ ! -z "$rvm_hook" ]] ; then
+declare rvm_verbose_flag=${rvm_verbose_flag:-0}
+declare rvm_hook=${rvm_hook:-""}
+
+if [[ -n "$rvm_hook" ]] ; then
   if [[ -s "$rvm_hooks_path/$rvm_hook" ]] ; then
-    if [[ "$rvm_verbose_flag" -eq 1 ]] || [[ "$rvm_debug_flag" -eq 1 ]] ; then
+    if [[ $rvm_verbose_flag -eq 1 ]] || [[ "$rvm_debug_flag" -eq 1 ]] ; then
       "$rvm_scripts_path/log" "info" "running hook $rvm_hook"
     fi
     source "$rvm_hooks_path/$rvm_hook"
   fi
-fi ; unset rvm_hook
+fi
+unset rvm_hook