free NULL cleanup -- coda

After the finale, the "real" final part. :)  Do a recursive grep with
"-B1 -w [a-zA-Z0-9_]*_free" to see if any of the preceeding lines are
an "if NULL" check that can be removed.

Reviewed-by: Tim Hudson <tjh@openssl.org>

demos/engines/ibmca/hw_ibmca.c

@@ -596,8 +596,7 @@ static int ibmca_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa)
                                       rsa->dmq1, rsa->iqmp, ctx);
     }
  err:
-    if (ctx)
-        BN_CTX_free(ctx);
+    BN_CTX_free(ctx);
     return to_return;
 }
 #  endif