build: suppress an ignored-write-return-value warning

* bootstrap (modules): Add ignore-value.
* src/guestfs.c: Include "ignore-value.h".
(stdout_event): Ignore failure to write to stderr.
Also, prefer STDERR_FILENO over the literal "2".
* src/Makefile.am (libguestfs_la_CPPFLAGS): Include gnulib's .h files.
(libprotocol_la_CFLAGS): Remove -Wall -Wno-unused.

1 files changed, 1 insertions, 0 deletions

diff --git a/bootstrap b/bootstrap
index cea8c407..76e22169 100755
--- a/bootstrap
+++ b/bootstrap
@@ -53,6 +53,7 @@ modules='
 gitlog-to-changelog
 gnu-make
 gnumakefile
+ignore-value
 maintainer-makefile
 manywarnings
 warnings