Fixed some warnings reported by clang.

lib/initend.c

@@ -280,7 +280,6 @@ xbps_init(struct xbps_handle *xhp)
 		xbps_dbg_printf(xhp, "failed to read configuration file %s: %s\n",
 		     xhp->conffile, strerror(rv));
 		xbps_dbg_printf(xhp, "Using built-in defaults\n");
-		rv = 0;
 	}
 	/* Set rootdir */
 	if (xhp->rootdir[0] == '\0') {

lib/pubkey2fp.c

@@ -124,7 +124,7 @@ xbps_pubkey2fp(struct xbps_handle *xhp, xbps_data_t pubkey)
 	memcpy(pEncoding, pSshHeader, 11);
 
 	index = SshEncodeBuffer(&pEncoding[11], eLen, eBytes);
-	index = SshEncodeBuffer(&pEncoding[11 + index], nLen, nBytes);
+	(void)SshEncodeBuffer(&pEncoding[11 + index], nLen, nBytes);
 
 	/*
 	 * Compute the RSA fingerprint (MD5).