Fix arrays initialization

Author: subnixr

minimal.zsh

@@ -6,11 +6,11 @@ MNML_USER_CHAR="${MNML_USER_CHAR:-λ}"
 MNML_INSERT_CHAR="${MNML_INSERT_CHAR:-›}"
 MNML_NORMAL_CHAR="${MNML_NORMAL_CHAR:-·}"
 
-[ -z "$MNML_PROMPT" ] && MNML_PROMPT=(mnml_ssh mnml_pyenv mnml_status mnml_keymap)
-[ -z "$MNML_RPROMPT" ] && MNML_RPROMPT=('mnml_cwd 2 0' mnml_git)
-[ -z "$MNML_INFOLN" ] && MNML_INFOLN=(mnml_err mnml_jobs mnml_uhp mnml_files)
+[ "${+MNML_PROMPT}" -eq 0 ] && MNML_PROMPT=(mnml_ssh mnml_pyenv mnml_status mnml_keymap)
+[ "${+MNML_RPROMPT}" -eq 0 ] && MNML_RPROMPT=('mnml_cwd 2 0' mnml_git)
+[ "${+MNML_INFOLN}" -eq 0 ] && MNML_INFOLN=(mnml_err mnml_jobs mnml_uhp mnml_files)
 
-[ -z "$MNML_MAGICENTER" ] && MNML_MAGICENTER=(mnml_me_dirs mnml_me_ls mnml_me_git)
+[ "${+MNML_MAGICENTER}" -eq 0 ] && MNML_MAGICENTER=(mnml_me_dirs mnml_me_ls mnml_me_git)
 
 # Components
 function mnml_status {