Fixes these two warnings:

certdump.c:938: warning: the address of 't' will always evaluate as 'true'
dotlock.c:457: warning: 'pid' may be used uninitialized in this function

Index: sm/certdump.c
===================================================================
--- sm/certdump.c	(revision 4688)
+++ sm/certdump.c	(working copy)
@@ -935,7 +935,7 @@
   ksba_free (sexp);
 
   ksba_cert_get_validity (cert, 0, t);
-  if (t && *t)
+  if (*t)
     sprintf (created, "%.4s-%.2s-%.2s", t, t+4, t+6);
   else
     *created = 0;
Index: jnlib/dotlock.c
===================================================================
--- jnlib/dotlock.c	(revision 4688)
+++ jnlib/dotlock.c	(working copy)
@@ -454,7 +454,7 @@
 #else
   char buffer_space[10+1+70+1]; /* 70 is just an estimated value; node
                                    name are usually shorter. */
-  int fd, pid;
+  int fd, pid = -1;
   char *buffer, *p;
   size_t expected_len;
   int res, nread;