Coverity: fix two minor NPD issues.

Found by Coverity.
Reviewed-by: NMatt Caswell <matt@openssl.org>
Reviewed-by: NTim Hudson <tjh@openssl.org>
Reviewed-by: NPaul Dale <paul.dale@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/8274)

(cherry picked from commit 23dc8feba817560485da00d690d7b7b9e5b15682)

crypto/conf/conf_lib.c

@@ -356,8 +356,10 @@ OPENSSL_INIT_SETTINGS *OPENSSL_INIT_new(void)
 {
     OPENSSL_INIT_SETTINGS *ret = malloc(sizeof(*ret));
 
-    if (ret != NULL)
-        memset(ret, 0, sizeof(*ret));
+    if (ret == NULL)
+        return NULL;
+
+    memset(ret, 0, sizeof(*ret));
     ret->flags = DEFAULT_CONF_MFLAGS;
 
     return ret;

crypto/ex_data.c

@@ -235,7 +235,7 @@ int CRYPTO_new_ex_data(int class_index, void *obj, CRYPTO_EX_DATA *ad)
         return 0;
     }
     for (i = 0; i < mx; i++) {
-        if (storage[i] && storage[i]->new_func) {
+        if (storage[i] != NULL && storage[i]->new_func != NULL) {
             ptr = CRYPTO_get_ex_data(ad, i);
             storage[i]->new_func(obj, ptr, ad, i,
                                  storage[i]->argl, storage[i]->argp);
@@ -299,7 +299,7 @@ int CRYPTO_dup_ex_data(int class_index, CRYPTO_EX_DATA *to,
 
     for (i = 0; i < mx; i++) {
         ptr = CRYPTO_get_ex_data(from, i);
-        if (storage[i] && storage[i]->dup_func)
+        if (storage[i] != NULL && storage[i]->dup_func != NULL)
             if (!storage[i]->dup_func(to, from, &ptr, i,
                                       storage[i]->argl, storage[i]->argp))
                 goto err;