Fix some size_t to long casts.

Maybe someday we'll be able to turn on that warning. (The EVP_CIPHER
hooks take size_t while the functions took long.)

Change-Id: Ic4da44efca9419a7f703e232d3f92638eb4ab37a
Reviewed-on: https://boringssl-review.googlesource.com/c/34084
Commit-Queue: Adam Langley <agl@google.com>
Reviewed-by: Adam Langley <agl@google.com>
diff --git a/include/openssl/blowfish.h b/include/openssl/blowfish.h
index ecf9d45..293b175 100644
--- a/include/openssl/blowfish.h
+++ b/include/openssl/blowfish.h
@@ -81,9 +81,9 @@
 
 OPENSSL_EXPORT void BF_ecb_encrypt(const uint8_t *in, uint8_t *out,
                                    const BF_KEY *key, int enc);
-OPENSSL_EXPORT void BF_cbc_encrypt(const uint8_t *in, uint8_t *out, long length,
-                                   const BF_KEY *schedule, uint8_t *ivec,
-                                   int enc);
+OPENSSL_EXPORT void BF_cbc_encrypt(const uint8_t *in, uint8_t *out,
+                                   size_t length, const BF_KEY *schedule,
+                                   uint8_t *ivec, int enc);
 
 
 #ifdef  __cplusplus