chruby: donʼt try to execute .sh files before loading

plugins/chruby/chruby.plugin.zsh

@@ -45,11 +45,11 @@ _source_from_omz_settings() {
     zstyle -s :omz:plugins:chruby path _chruby_path
     zstyle -s :omz:plugins:chruby auto _chruby_auto
 
-    if ${_chruby_path} && [[ -r ${_chruby_path} ]]; then
+    if [[ -r ${_chruby_path} ]]; then
         source ${_chruby_path}
     fi
 
-    if ${_chruby_auto} && [[ -r ${_chruby_auto} ]]; then
+    if [[ -r ${_chruby_auto} ]]; then
         source ${_chruby_auto}
     fi
 }