maint: fix warning 'possible use of "=" where "==" was intended'

* src/mktemp.c: maint: avoid warning by using the comma operator
rather than an always-true conditional (as suggested by Eric Blake).
Reported by Joachim Schmitz in http://debbugs.gnu.org/9064.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/mktemp.c b/src/mktemp.c
index 2fe22b76b..e592176a7 100644
--- a/src/mktemp.c
+++ b/src/mktemp.c
@@ -344,7 +344,7 @@ main (int argc, char **argv)
       puts (dest_name);
       /* If we created a file, but then failed to output the file
          name, we should clean up the mess before failing.  */
-      if (!dry_run && (stdout_closed = true) && close_stream (stdout) != 0)
+      if (!dry_run && ((stdout_closed = true), close_stream (stdout) != 0))
         {
           int saved_errno = errno;
           remove (dest_name);