Request to apply bugfix patch

[ktjjang]

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Environment (please complete the following information):

• OS: it doesn't matter
• (Neo)Vim version: it doesn't matter
• vim-clap version: it doesn't matter
• Have you reproduced with a minimal vimrc: it doesn't matter
• Have you updated to the latest plugin version: yes, i have updated to the latest version
• Have you upgraded to/compiled the latest Rust binary: ???

Describe the bug
A clear and concise description of what the bug is.

It is a fault due to conditional statement check in the state where there is no initial value.
The patch below will fix it. please apply

diff --git a/autoload/clap/spinner.vim b/autoload/clap/spinner.vim
index ff3e247..55c2d2c 100644
--- a/autoload/clap/spinner.vim
+++ b/autoload/clap/spinner.vim
@@ -13,6 +13,7 @@ let s:IDLE = ' '

let s:frame_index = 0
let s:spinner = s:IDLE
+let s:is_busy = 0

" The spinner and current provider prompt are actually displayed in a same window.
function! s:fill_in_placeholders(prompt_format) abort

Clap debug

To Reproduce
Steps to reproduce the behavior:

1. Create the minimal vimrc min.vim:
   it doesn't matter

2. Start (neo)vim with command: vim -u min.vim
   it doesn't matter

3. Type '....'
   Run "Clap filer" as soon as you start vi editor
   and type any character to the textbox in Clap filer window

4. See error
   you can see following error

Error detected while processing function 48_apply_input[4]..31[14]..function 48_apply_input[4]..31[13]..clap#spinner#set_idle:
line 1:
E121: Undefined variable: s:is_busy
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Expected behavior
A clear and concise description of what you expected to happen.

Screenshots
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Additional context
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[liuchengxu]

Thanks for the report, I had the fix on another WIP branch and forgot to patch it to the master :(. BTW, feel free to try out https://github.com/liuchengxu/vim-clap/tree/arc-item which has a lot of improvements, the performance of filtering is 2x faster (9s to 4s for more than 3 million items) by running in parallel, it's not yet quite stable though.

[ktjjang]

Thank you for you to fix it. I have being used this tool about two years. I'm really glad to use this state of the art tool.