Fix a bogus warning about an uninitialised var

The variable in question can never be used uninitialised, but we silence
the compiler anyway.

Fixes #6301

Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/6329)

diff --git a/crypto/rsa/rsa_oaep.c b/crypto/rsa/rsa_oaep.c
index 9a01b4afc11fb4da89889ed1362bbbcf9cea0068..9def7a0467c035c05c3bb9125d704442b53434b9 100644 (file)
--- a/crypto/rsa/rsa_oaep.c
+++ b/crypto/rsa/rsa_oaep.c
@@ -120,7 +120,7 @@ int RSA_padding_check_PKCS1_OAEP_mgf1(unsigned char *to, int tlen,
                                       int plen, const EVP_MD *md,
                                       const EVP_MD *mgf1md)
 {
-    int i, dblen, mlen = -1, one_index = 0, msg_index;
+    int i, dblen = 0, mlen = -1, one_index = 0, msg_index;
     unsigned int good, found_one_byte;
     const unsigned char *maskedseed, *maskeddb;
     /*