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-rw-r--r--libass/ass_utils.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/libass/ass_utils.h b/libass/ass_utils.h
index 377d532..0743ff2 100644
--- a/libass/ass_utils.h
+++ b/libass/ass_utils.h
@@ -104,6 +104,9 @@ int numpad2align(int val);
unsigned ass_utf8_get_char(char **str);
unsigned ass_utf8_put_char(char *dest, uint32_t ch);
void ass_utf16be_to_utf8(char *dst, size_t dst_size, uint8_t *src, size_t src_size);
+#ifdef __GNUC__
+ __attribute__ ((format (printf, 3, 4)))
+#endif
void ass_msg(ASS_Library *priv, int lvl, const char *fmt, ...);
int lookup_style(ASS_Track *track, char *name);
ASS_Style *lookup_style_strict(ASS_Track *track, char *name, size_t len);