Compile warning fixes.

src/plugins/sieve-extprograms/script-client-remote.c

@@ -114,14 +114,6 @@ static ssize_t script_client_istream_read(struct istream_private *stream)
 	return ret;
 }
 
-static void ATTR_NORETURN script_client_istream_seek
-(struct istream_private *stream ATTR_UNUSED, uoff_t v_offset ATTR_UNUSED,
-	bool mark ATTR_UNUSED)
-{
-	// FIXME: implement forward seeking
-	i_panic("script_client_istream seek() not implemented");
-}
-
 static void ATTR_NORETURN script_client_istream_sync
 (struct istream_private *stream ATTR_UNUSED)
 {

src/plugins/sieve-extprograms/sieve-extprograms-common.h

@@ -77,7 +77,7 @@ int sieve_extprogram_command_read_operands
 
 void sieve_extprogram_exec_error
 	(struct sieve_error_handler *ehandler, const char *location,
-		const char *fmt, ...);
+		const char *fmt, ...) ATTR_FORMAT(3, 4);
 
 struct sieve_extprogram *sieve_extprogram_create
 	(const struct sieve_extension *ext, const struct sieve_script_env *senv,