check VIM existence

dot_bashrc

@@ -33,10 +33,12 @@ shopt -s checkwinsize
 #  EDITOR
 # ---------------------------------------------------------------------------
 
+if [ -f "/usr/bin/vim" ]; then
   export EDITOR=/usr/bin/vim
   export SVN_EDITOR=/usr/bin/vim
   export GIT_EDITOR=/usr/bin/vim
   export VISUAL=/usr/bin/vim
+fi
 
 # ---------------------------------------------------------------------------
 #  PROMPT