fix unititialized value use when timestamping qconfig.h

we may be creating the forwarding header for a not yet existing file, so
the timestamp may be undefined.

Task-number: QTBUG-15330
Merge-request: 1174
Reviewed-by: ossi

1 files changed, 3 insertions, 1 deletions

diff --git a/bin/syncqt b/bin/syncqt
index b8f1ee7..7e1f581 100755
--- a/bin/syncqt
+++ b/bin/syncqt
@@ -334,7 +334,9 @@ sub syncHeader {
         open HEADER, ">$header" || die "Could not open $header for writing!\n";
         print HEADER "#include \"$iheader_out\"\n";
         close HEADER;
-        utime(time, $ts, $header) or die "$iheader, $header";
+        if(defined($ts)) {
+            utime(time, $ts, $header) or die "$iheader, $header";
+        }
         return 1;
     }
     return 0;