Enable -Wmissing-variable-declarations and
-Wincompatible-pointer-types-discards-qualifiers (the latter did not require
any code changes).

Reviewed-by: Rich Salz <rsalz@openssl.org>

apps/speed.c

diff --git a/apps/speed.c b/apps/speed.c
index 297ea52..1508076 100644
--- a/apps/speed.c
+++ b/apps/speed.c
@@ -405,7 +405,7 @@
 #define D_IGE_192_AES   27
 #define D_IGE_256_AES   28
 #define D_GHASH         29
-OPT_PAIR doit_choices[] = {
+static OPT_PAIR doit_choices[] = {
 #ifndef OPENSSL_NO_MD2
     {"md2", D_MD2},
 #endif