[PATCH 4/4] virtiofsd: avoid false positive compiler warning

[Christian Borntraeger]

make: *** [Makefile:121: config-host.mak] Error 1
[cborntra@m83lp52 qemu]$ make -C build/
make: Entering directory '/home/cborntra/REPOS/qemu/build'
Generating qemu-version.h with a meson_exe.py custom command
Compiling C object tools/virtiofsd/virtiofsd.p/passthrough_ll.c.o
../tools/virtiofsd/passthrough_ll.c: In function ‘lo_setattr’:
../tools/virtiofsd/passthrough_ll.c:702:19: error: ‘fd’ may be used 
uninitialized in this function [-Werror=maybe-uninitialized]
  702 |             res = futimens(fd, tv);
      |                   ^~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors
make: *** [Makefile.ninja:1438: tools/virtiofsd/virtiofsd.p/passthrough_ll.c.o] 
Error 1
make: Leaving directory '/home/cborntra/REPOS/

as far as I can see this can not happen. Let us silence the warning by
giving fd a default value.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
---
 tools/virtiofsd/passthrough_ll.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/virtiofsd/passthrough_ll.c b/tools/virtiofsd/passthrough_ll.c
index 0b229ebd5786..da06aa6e9264 100644
--- a/tools/virtiofsd/passthrough_ll.c
+++ b/tools/virtiofsd/passthrough_ll.c
@@ -620,7 +620,7 @@ static void lo_setattr(fuse_req_t req, fuse_ino_t ino, 
struct stat *attr,
     struct lo_inode *inode;
     int ifd;
     int res;
-    int fd;
+    int fd = 0;
 
     inode = lo_inode(req, ino);
     if (!inode) {
-- 
2.26.2