[glibc/azanella/clang] posix: Use unsigned to check for _POSIX_VDISABLE

[Adhemerval Zanella <azanella@sourceware.org>]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=fe98553c962205b5547b7b39f5c6c5d1031b436a

commit fe98553c962205b5547b7b39f5c6c5d1031b436a
Author: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Date:   Tue Mar 15 18:09:10 2022 -0300

    posix: Use unsigned to check for _POSIX_VDISABLE
    
    Clang warns:
    
      ../sysdeps/posix/fpathconf.c:118:21: error: right side of operator
      converted from negative value to unsigned: -1 to 18446744073709551615
      [-Werror]
      #if _POSIX_VDISABLE == -1
        ~~~~~~~~~~~~~~~ ^  ~~

Diff:
---
 sysdeps/posix/fpathconf.c | 2 +-
 sysdeps/posix/pathconf.c  | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/sysdeps/posix/fpathconf.c b/sysdeps/posix/fpathconf.c
index ce432962cd..d5436e523a 100644
--- a/sysdeps/posix/fpathconf.c
+++ b/sysdeps/posix/fpathconf.c
@@ -115,7 +115,7 @@ __fpathconf (int fd, int name)
       return _POSIX_NO_TRUNC;
 
     case _PC_VDISABLE:
-#if _POSIX_VDISABLE == -1
+#if _POSIX_VDISABLE == -1U
 # error "Invalid value for _POSIX_VDISABLE"
 #endif
       return _POSIX_VDISABLE;
diff --git a/sysdeps/posix/pathconf.c b/sysdeps/posix/pathconf.c
index 2cf0ad5abf..8e15801dbf 100644
--- a/sysdeps/posix/pathconf.c
+++ b/sysdeps/posix/pathconf.c
@@ -113,7 +113,7 @@ __pathconf (const char *path, int name)
       return _POSIX_NO_TRUNC;
 
     case _PC_VDISABLE:
-#if _POSIX_VDISABLE == -1
+#if _POSIX_VDISABLE == -1U
 # error "Invalid value for _POSIX_VDISABLE"
 #endif
       return _POSIX_VDISABLE;