[Fix #541] Do not auto-load screen/tmux inside of Emacs/Vim

When Emacs and Vim are launched from outside of an interactive shell,
$TMUX and $STY are not set; check for Emacs and Vim environment
variables instead.

Signed-off-by: Sorin Ionescu <sorin.ionescu@gmail.com>

modules/screen/init.zsh

@@ -15,7 +15,7 @@ fi
 # Auto Start
 #
 
-if [[ -z "$STY" ]] && ( \
+if [[ -z "$STY" && ( -n "$INSIDE_EMACS" || -n "$EMACS" || -n "$VIM" ) ]] && ( \
   ( [[ -n "$SSH_TTY" ]] && zstyle -t ':prezto:module:screen:auto-start' remote ) ||
   ( [[ -z "$SSH_TTY" ]] && zstyle -t ':prezto:module:screen:auto-start' local ) \
 ); then

modules/tmux/init.zsh

@@ -16,7 +16,7 @@ fi
 # Auto Start
 #
 
-if [[ -z "$TMUX" ]] && ( \
+if [[ -z "$TMUX" && ( -n "$INSIDE_EMACS" || -n "$EMACS" || -n "$VIM" ) ]] && ( \
   ( [[ -n "$SSH_TTY" ]] && zstyle -t ':prezto:module:tmux:auto-start' remote ) ||
   ( [[ -z "$SSH_TTY" ]] && zstyle -t ':prezto:module:tmux:auto-start' local ) \
 ); then