tree dff8cef66a7067190f1e75e45f520b557b51e676
parent ee59de58cd3ebe9e98d19aeaadb39915b0b235fc
author Benjamin Drung <benjamin.drung@profitbricks.com> 1528883319 +0200
committer Ben Hutchings <ben@decadent.org.uk> 1546398484 +0000

[klibc] mount_main: Fix empty string check

gcc 7.3.0 complains:

```
usr/utils/mount_main.c: In function ‘print_mount’:
usr/utils/mount_main.c:46:46: warning: comparison between pointer and zero character constant [-Wpointer-compare]
   if (mnt->mnt_type != NULL && mnt->mnt_type != '\0')
                                              ^~
usr/utils/mount_main.c:46:32: note: did you mean to dereference the pointer?
   if (mnt->mnt_type != NULL && mnt->mnt_type != '\0')
                                ^
usr/utils/mount_main.c:48:46: warning: comparison between pointer and zero character constant [-Wpointer-compare]
   if (mnt->mnt_opts != NULL && mnt->mnt_opts != '\0')
                                              ^~
usr/utils/mount_main.c:48:32: note: did you mean to dereference the pointer?
   if (mnt->mnt_opts != NULL && mnt->mnt_opts != '\0')
                                ^
```

Link: https://www.zytor.com/pipermail/klibc/2018-June/003994.html
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>