Restore module loading

The module loading feature got broken a while ago, so restore it, but
have it a bit more explicit this time around.

Reviewed-by: Stephen Henson <steve@openssl.org>

apps/speed.c

diff --git a/apps/speed.c b/apps/speed.c
index 4b3da87..b93237e 100644
--- a/apps/speed.c
+++ b/apps/speed.c
@@ -856,6 +856,9 @@
     argc = opt_num_rest();
     argv = opt_rest();
 
+    if (!app_load_modules(NULL))
+        goto end;
+
     /* Remaining arguments are algorithms. */
     for ( ; *argv; argv++) {
         if (found(*argv, doit_choices, &i)) {