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-rw-r--r--libass/ass_parse.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/libass/ass_parse.h b/libass/ass_parse.h
index e8512b2..2b4cee0 100644
--- a/libass/ass_parse.h
+++ b/libass/ass_parse.h
@@ -36,7 +36,7 @@ void process_karaoke_effects(ASS_Renderer *render_priv);
unsigned get_next_char(ASS_Renderer *render_priv, char **str);
char *parse_tag(ASS_Renderer *render_priv, char *p, char *end, double pwr);
int event_has_hard_overrides(char *str);
-extern void change_alpha(uint32_t *var, uint32_t new, double pwr);
+extern void change_alpha(uint32_t *var, int32_t new, double pwr);
extern uint32_t mult_alpha(uint32_t a, uint32_t b);