patch 9.0.0126: expanding file names fails in dir with more than 255 entries

Problem:    Expanding file names fails in directory with more than 255
            entries.
Solution:   Use an int instead of char_u to count. (John Drouhard,
            closes #10818)

src/findfile.c

@@ -75,7 +75,7 @@ typedef struct ff_stack
     // of wc_part
     char_u		**ffs_filearray;
     int			ffs_filearray_size;
-    char_u		ffs_filearray_cur;   // needed for partly handled dirs
+    int			ffs_filearray_cur;   // needed for partly handled dirs
 
     // to store status of partly handled directories
     // 0: we work on this directory for the first time

src/testdir/test_gf.vim

@@ -138,7 +138,7 @@ func Test_gf_visual()
   call assert_equal('Xtest_gf_visual', bufname('%'))
   call assert_equal(3, getcurpos()[1])
 
-  " do not include the NUL at the end 
+  " do not include the NUL at the end
   call writefile(['x'], 'X')
   let save_enc = &enc
   for enc in ['latin1', 'utf-8']
@@ -250,4 +250,27 @@ func Test_includeexpr_scriptlocal_func()
   bw!
 endfunc
 
+" Check that expanding directories can handle more than 255 entries.
+func Test_gf_subdirs_wildcard()
+  let cwd = getcwd()
+  let dir = 'Xtestgf_dir'
+  call mkdir(dir)
+  call chdir(dir)
+  for i in range(300)
+    call mkdir(i)
+    call writefile([], i .. '/' .. i, 'S')
+  endfor
+  set path=./**
+
+  new | only
+  call setline(1, '99')
+  w! Xtest1
+  normal gf
+  call assert_equal('99', fnamemodify(bufname(''), ":t"))
+
+  call chdir(cwd)
+  call delete(dir, 'rf')
+  set path&
+endfunc
+
 " vim: shiftwidth=2 sts=2 expandtab

src/version.c

@@ -735,6 +735,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    126,
 /**/
     125,
 /**/