ppbloom:remove unnecessay bloom_check

bbloom_add and bbloom_check are in fact the same function.
let's make bbloom_add return collision information.

src/aead.c

@@ -695,11 +695,10 @@ aead_decrypt(buffer_t *ciphertext, cipher_ctx_t *cipher_ctx, size_t capacity)
 
     // Add the salt to bloom filter
     if (cipher_ctx->init == 1) {
-        if (ppbloom_check((void *)cipher_ctx->salt, salt_len) == 1) {
+        if (ppbloom_add((void *)cipher_ctx->salt, salt_len) == 1) {
             LOGE("crypto: AEAD: repeat salt detected");
             return CRYPTO_ERROR;
         }
-        ppbloom_add((void *)cipher_ctx->salt, salt_len);
         cipher_ctx->init = 2;
     }
 

src/ppbloom.c

@@ -80,7 +80,7 @@ ppbloom_add(const void *buffer, int len)
 {
     int err;
     err = bloom_add(ppbloom + current, buffer, len);
-    if (err == -1)
+    if (err == -1 || err == 1)
         return err;
 
     bloom_count[current]++;