make sure error queue is totally emptied

PR: 359

crypto/asn1/a_d2i_fp.c

@@ -197,7 +197,7 @@ static int asn1_d2i_read_bio(BIO *in, BUF_MEM **pb)
 			if (e != ASN1_R_TOO_LONG)
 				goto err;
 			else
-				ERR_get_error(); /* clear error */
+				ERR_clear_error(); /* clear error */
 			}
 		i=c.p-p;/* header length */
 		off+=i;	/* end of data */

crypto/conf/conf_lib.c

@@ -184,7 +184,7 @@ long CONF_get_number(LHASH *conf,const char *group,const char *name)
 	if (status == 0)
 		{
 		/* This function does not believe in errors... */
-		ERR_get_error();
+		ERR_clear_error();
 		}
 	return result;
 	}

crypto/conf/conf_mod.c

@@ -254,7 +254,7 @@ static CONF_MODULE *module_load_dso(const CONF *cnf, char *name, char *value,
 	path = NCONF_get_string(cnf, value, "path");
 	if (!path)
 		{
-		ERR_get_error();
+		ERR_clear_error();
 		path = name;
 		}
 	dso = DSO_load(NULL, path, NULL, 0);

crypto/objects/obj_dat.c

@@ -414,7 +414,7 @@ ASN1_OBJECT *OBJ_txt2obj(const char *s, int no_name)
 	i=a2d_ASN1_OBJECT(NULL,0,s,-1);
 	if (i <= 0) {
 		/* Clear the error */
-		ERR_get_error();
+		ERR_clear_error();
 		return NULL;
 	}
 	/* Work out total size */

crypto/pkcs7/bio_ber.c

@@ -204,7 +204,7 @@ int bio_ber_get_header(BIO *bio, BIO_BER_CTX *ctx)
 		if ((ctx->buf_len < BER_BUF_SIZE) &&
 			(ERR_GET_REASON(ERR_peek_error()) == ASN1_R_TOO_LONG))
 			{
-			ERR_get_error(); /* clear the error */
+			ERR_clear_error(); /* clear the error */
 			BIO_set_retry_read(b);
 			}
 		return(-1);

crypto/rand/md_rand.c

@@ -520,7 +520,7 @@ static int ssleay_rand_pseudo_bytes(unsigned char *buf, int num)
 		err = ERR_peek_error();
 		if (ERR_GET_LIB(err) == ERR_LIB_RAND &&
 		    ERR_GET_REASON(err) == RAND_R_PRNG_NOT_SEEDED)
-			(void)ERR_get_error();
+			ERR_clear_error();
 		}
 	return (ret);
 	}