free null cleanup finale

Don't check for NULL before calling OPENSSL_free

Reviewed-by: Richard Levitte <levitte@openssl.org>
diff --git a/apps/dsa.c b/apps/dsa.c
index c23ed5d..d864c75 100644
--- a/apps/dsa.c
+++ b/apps/dsa.c
@@ -275,10 +275,8 @@
  end:
     BIO_free_all(out);
     DSA_free(dsa);
-    if (passin)
-        OPENSSL_free(passin);
-    if (passout)
-        OPENSSL_free(passout);
+    OPENSSL_free(passin);
+    OPENSSL_free(passout);
     return (ret);
 }
 #else                           /* !OPENSSL_NO_DSA */