util/find-doc-nits: check podchecker() return value

From the Pod::Checker manual:

> RETURN VALUE
>        podchecker returns the number of POD syntax errors found or
>        -1 if there were no POD commands at all found in the file.

Reviewed-by: David von Oheimb <david.von.oheimb@siemens.com>
(Merged from https://github.com/openssl/openssl/pull/13416)

1 files changed, 2 insertions, 1 deletions

diff --git a/util/find-doc-nits b/util/find-doc-nits
index a581adfa35..c311d792f2 100755
--- a/util/find-doc-nits
+++ b/util/find-doc-nits
@@ -778,7 +778,8 @@ sub check {
 
     open my $OUT, '>', $temp
         or die "Can't open $temp, $!";
-    podchecker($filename, $OUT);
+    err($id, "POD errors")
+        if podchecker($filename, $OUT) != 0;
     close $OUT;
     open $OUT, '<', $temp
         or die "Can't read $temp, $!";