don't unset prompt_sp when bailing early

internal/p10k.zsh

@@ -3606,7 +3606,7 @@ _p9k_set_instant_prompt() {
   RPROMPT=$saved_rprompt
 }
 
-typeset -gri __p9k_instant_prompt_version=11
+typeset -gri __p9k_instant_prompt_version=12
 
 _p9k_dump_instant_prompt() {
   local user=${(%):-%n}
@@ -3635,7 +3635,7 @@ _p9k_dump_instant_prompt() {
   [[ -t 0 && -t 1 && -t 2 && \$ZSH_VERSION == ${(q)ZSH_VERSION} && \$ZSH_PATCHLEVEL == ${(q)ZSH_PATCHLEVEL} &&
      \$TERM_PROGRAM $hyper 'Hyper' && \$+VTE_VERSION == $+VTE_VERSION &&
      \$POWERLEVEL9K_DISABLE_INSTANT_PROMPT != 'true' &&
-     \$POWERLEVEL9K_INSTANT_PROMPT != 'off' ]] || { __p9k_instant_prompt_sourced=0; return; }
+     \$POWERLEVEL9K_INSTANT_PROMPT != 'off' ]] || { __p9k_instant_prompt_sourced=0; return 1; }
   local -i ZLE_RPROMPT_INDENT=${ZLE_RPROMPT_INDENT:-1}
   local PROMPT_EOL_MARK=${(q)PROMPT_EOL_MARK-%B%S%#%s%b}
   [[ -n \$SSH_CLIENT || -n \$SSH_TTY || -n \$SSH_CONNECTION ]] && local ssh=1 || local ssh=0