fixing vim's [[ and ]] for bad code

I just added something to my .vim/c.vim to make [[ and ]] work even if the code does not have { on new lines.

    function! FindFunctionDefinition(dir)
            let l:lastpattern = @/
            if a:dir==-1
                    ?^\(\a.*(\_[^\)]*) *\)\{,1\}{
            elseif a:dir==1
                    /^\(\a.*(\_[^\)]*) *\)\{,1\}{
            endif 
            let @/ = l:lastpattern
    endfunction

    nmap [[ :call FindFunctionDefinition(-1)<CR>
    nmap ]] :call FindFunctionDefinition(1)<CR>

This will make [[ and ]] find the next and previous function even if the first { is not in the first column.