[PATCH] arm64: fix build regression in of_path_of_nvme

[Joakim Bech]

The of_path_of_nvme function introduced a build regression:
    grub-core/osdep/linux/ofpath.c:365:21: error: comparison between pointer
    and zero character constant [-Werror=pointer-compare]
       if ((digit_string != '\0') && (*part_end == 'p'))

Update digit_string to compare against the char instead of the pointer.

Signed-off-by: Joakim Bech <address@hidden>
---
 grub-core/osdep/linux/ofpath.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/grub-core/osdep/linux/ofpath.c b/grub-core/osdep/linux/ofpath.c
index 4308fceda..1c30e7233 100644
--- a/grub-core/osdep/linux/ofpath.c
+++ b/grub-core/osdep/linux/ofpath.c
@@ -362,7 +362,7 @@ of_path_of_nvme(const char *sys_devname 
__attribute__((unused)),
   digit_string = trailing_digits (device);
   part_end = devicenode + strlen (devicenode) - 1;
 
-  if ((digit_string != '\0') && (*part_end == 'p'))
+  if ((*digit_string != '\0') && (*part_end == 'p'))
     {
       /* We have a partition number, strip it off. */
       int part;
-- 
2.14.1