runtime(netrw): Fix w:netrw_bannercnt ref error with `netrw_fastbro…

…wse=2` (#13659)

* NetRW: Fix `w:netrw_bannercnt` ref error with `netrw_fastbrowse=2`
* NetRW: Fix wrong `w:netrw_bannercnt` setting

closes: #13640 

Signed-off-by: yasuda <yasuda@kyoto-sr.co.jp>
Signed-off-by: Christian Brabandt <cb@256bit.org>

runtime/autoload/netrw.vim

@@ -10380,7 +10380,7 @@ fun! s:NetrwRemoteListing()
    let w:netrw_bannercnt= s:bannercnt
   endif
   if !exists("w:netrw_bannercnt") && exists("b:bannercnt")
-   let w:netrw_bannercnt= s:bannercnt
+   let w:netrw_bannercnt= b:bannercnt
   endif
 
   call s:RemotePathAnalysis(b:netrw_curdir)
@@ -11274,6 +11274,10 @@ endfun
 fun! s:NetrwLocalRename(path) range
 "  call Dfunc("NetrwLocalRename(path<".a:path.">)")
 
+  if !exists("w:netrw_bannercnt")
+   let w:netrw_bannercnt= b:netrw_bannercnt
+  endif
+
   " preparation for removing multiple files/directories
   let ykeep     = @@
   let ctr       = a:firstline
@@ -11375,6 +11379,10 @@ fun! s:NetrwLocalRm(path) range
 "  call Dfunc("s:NetrwLocalRm(path<".a:path.">)")
 "  call Decho("firstline=".a:firstline." lastline=".a:lastline,'~'.expand("<slnum>"))
 
+  if !exists("w:netrw_bannercnt")
+   let w:netrw_bannercnt= b:netrw_bannercnt
+  endif
+
   " preparation for removing multiple files/directories
   let ykeep = @@
   let ret   = 0