Merge pull request #355 from watsoncj/master^1

Fix to Random Theme Selection

oh-my-zsh.sh

@@ -31,7 +31,7 @@ if [ "$ZSH_THEME" = "random" ]
 then
   themes=($ZSH/themes/*zsh-theme)
   N=${#themes[@]}
-  ((N=RANDOM%N))
+  ((N=(RANDOM%N)+1))
   RANDOM_THEME=${themes[$N]}
   source "$RANDOM_THEME"
   echo "[oh-my-zsh] Random theme '$RANDOM_THEME' loaded..."