Update bgnotify.plugin.zsh

Fixed error with spaces in commands

plugins/bgnotify/bgnotify.plugin.zsh

@@ -33,9 +33,9 @@ bgnotify () {
   if hash terminal-notifier 2>/dev/null; then #osx
     terminal-notifier -message "$2" -title "$1"
   elif hash growlnotify 2>/dev/null; then #osx growl
-    growlnotify -m $1 $2
+    growlnotify -m "$1" "$2"
   elif hash notify-send 2>/dev/null; then #ubuntu!
-    notify-send $1 $2
+    notify-send "$1" "$2"
   elif hash notifu 2>/dev/null; then #cygwyn support!
     notifu /m "$2" /p "$1"
   fi