fix virtual col for multibyte JK motion when g:EasyMotion_startofline=0

Author: SolaWing

autoload/EasyMotion.vim

@@ -241,7 +241,7 @@ function! EasyMotion#JK(visualmode, direction) " {{{
     if g:EasyMotion_startofline
         call s:EasyMotion('^\(\w\|\s*\zs\|$\)', a:direction, a:visualmode ? visualmode() : '', 0)
     else
-        let vcol  = EasyMotion#helper#vcol('.')
+        let vcol = getcurpos()[4]
         let pattern = printf('^.\{-}\zs\(\%%<%dv.\%%>%dv\|$\)', vcol + 1, vcol)
         call s:EasyMotion(pattern, a:direction, a:visualmode ? visualmode() : '', 0)
     endif

autoload/EasyMotion/helper.vim

@@ -159,23 +159,6 @@ function! EasyMotion#helper#include_multibyte_char(str) "{{{
     return strlen(a:str) != EasyMotion#helper#strchars(a:str)
 endfunction "}}}
 
-function! EasyMotion#helper#vcol(expr) abort
-    let col_num = col(a:expr)
-    let line = getline(a:expr)
-    let before_line = col_num > 2 ? line[: col_num - 2]
-    \   : col_num is# 2 ? line[0]
-    \   : ''
-    let vcol_num = 1
-    for c in split(before_line, '\zs')
-        let vcol_num += c is# "\t" ? s:_virtual_tab2spacelen(vcol_num) : len(c)
-    endfor
-    return vcol_num
-endfunction
-
-function! s:_virtual_tab2spacelen(col_num) abort
-    return &tabstop - ((a:col_num - 1) % &tabstop)
-endfunction
-
 "}}}
 
 " Restore 'cpoptions' {{{