[patch] file descriptor leak fix

[Igor Zinovik]

        Hello, tech@

Following diff fixes file descriptor leak `ifd'.
Index: diffreg.c
===================================================================
RCS file: /cvs/src/usr.bin/diff/diffreg.c,v
retrieving revision 1.73
diff -u -r1.73 diffreg.c
--- diffreg.c   27 Oct 2009 23:59:37 -0000      1.73
+++ diffreg.c   21 Mar 2010 10:55:43 -0000
@@ -514,8 +514,10 @@
                return (NULL);
        }
 
-	if ((ofd = mkstemp(tempfile)) < 0)
+       if ((ofd = mkstemp(tempfile)) < 0) {
+               close(ifd);
                return (NULL);
+       }
        unlink(tempfile);
        while ((nread = read(ifd, buf, BUFSIZ)) > 0) {
                if (write(ofd, buf, nread) != nread) {