Make sure that RVM is loaded before defining extras

plugins/available/rvm.plugin.bash

@@ -3,11 +3,12 @@
 # Load RVM, if you are using it
 [[ -s $HOME/.rvm/scripts/rvm ]] && source $HOME/.rvm/scripts/rvm
 
-# Load the auto-completion script if RVM was loaded.
+# Check to make sure that RVM is actually loaded before adding
+# the customizations to it.
 if [ "$rvm_path" ]
 then
+    # Load the auto-completion script if RVM was loaded.
     [[ -r $rvm_path/scripts/completion ]] && . $rvm_path/scripts/completion
-fi
 
     switch () {
       rvm $1
@@ -24,3 +25,5 @@ rvm_default () {
     function rvm_version () {
       ruby --version
     }
+
+fi