des-test: Pass the proper types to av_des_*() functions

Fixes a number of incompatible pointer type warnings.

libavutil/tests/des.c

@@ -67,19 +67,22 @@ static int run_test(int cbc, int decrypt)
     }
 }
 
+union word_byte {
+    uint64_t word;
+    uint8_t byte[8];
+};
+
 int main(void)
 {
     AVDES d;
     int i;
-    uint64_t key[3];
-    uint64_t data;
-    uint64_t ct;
+    union word_byte key[3], data, ct;
     uint64_t roundkeys[16];
     srand(av_gettime());
-    key[0] = AV_RB64(test_key);
-    data   = AV_RB64(plain);
-    gen_roundkeys(roundkeys, key[0]);
-    if (des_encdec(data, roundkeys, 0) != AV_RB64(crypt)) {
+    key[0].word = AV_RB64(test_key);
+    data.word   = AV_RB64(plain);
+    gen_roundkeys(roundkeys, key[0].word);
+    if (des_encdec(data.word, roundkeys, 0) != AV_RB64(crypt)) {
         printf("Test 1 failed\n");
         return 1;
     }
@@ -94,15 +97,15 @@ int main(void)
         return 1;
     }
     for (i = 0; i < 1000; i++) {
-        key[0] = rand64();
-        key[1] = rand64();
-        key[2] = rand64();
-        data   = rand64();
-        av_des_init(&d, key, 192, 0);
-        av_des_crypt(&d, &ct, &data, 1, NULL, 0);
-        av_des_init(&d, key, 192, 1);
-        av_des_crypt(&d, &ct, &ct, 1, NULL, 1);
-        if (ct != data) {
+        key[0].word = rand64();
+        key[1].word = rand64();
+        key[2].word = rand64();
+        data.word   = rand64();
+        av_des_init(&d, key[0].byte, 192, 0);
+        av_des_crypt(&d, ct.byte, data.byte, 1, NULL, 0);
+        av_des_init(&d, key[0].byte, 192, 1);
+        av_des_crypt(&d, ct.byte, ct.byte, 1, NULL, 1);
+        if (ct.word != data.word) {
             printf("Test 2 failed\n");
             return 1;
         }