[PATCH] completion: bash: fix late declaration of __git_cmd_idx

A recent update to contrib/completion/git-completion.bash causes bash to fail auto complete custom commands that are wrapped with __git_func_wrap. Declaring __git_cmd_idx=0 inside __git_func_wrap resolves the issue.

Signed-off-by: Fabian Wermelinger <fabianw@mavt.ethz.ch>
---
Fixes `bash: [: -lt: unary operator expected` error for tab completions
of wrapped `git` commands.  For example, assume the convenience command
`gaa` defined in a shell script as

```bash git aa "$@" ```

where `git aa` is an alias to `git add --all`. Then `gaa` is wrapped for bash completion like

```bash __git_complete gaa _git_add ```

For this example, the current bash completion fails at `contrib/completion/git-completion.bash:1190` due to empty local variable `c` as `__git_cmd_idx` is empty at the definition in `contrib/completion/git-completion.bash:1179`. Defining `__git_cmd_idx=0` earlier in `__git_func_wrap` attempts to solve this problem.

 contrib/completion/git-completion.bash | 1 +
 1 file changed, 1 insertion(+)