unitialized buffer used in error situation

[Todd C. Miller]

One of the OpenBSD developers (David Krause) recently ran into a
cvs crash caused by the use of an unitialized buffer.  I examined
the traceback and found the source of the crash.  The simple fix
follows.

 - todd

Index: rcs.c
===================================================================
RCS file: /cvs/src/gnu/usr.bin/cvs/src/rcs.c,v
retrieving revision 1.16
diff -u -r1.16 rcs.c
--- rcs.c       8 Jan 2002 08:01:45 -0000       1.16
+++ rcs.c       25 Sep 2003 15:44:04 -0000
@@ -8427,6 +8427,11 @@
            (void) tm_to_internet (datebuf, wm);
            (void) sprintf (label, "-L%s\t%s", path, datebuf);
        }
+       else
+       {
+           free(label);
+           label = NULL;
+       }
     }
     return label;
 }