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lavc/ass_split: check for NULL pointer in ff_ass_split_override_codes(). 

This is consistent with the other ff_ass_split_* functions.

It also fixes a crash when trying to split a dialog with text=NULL
(which seems to happen when the text of the dialog is empty); basically,
this commit fixes crashes when trying to encode an empty text subtitle
dialog (see subrip and mov_text encoders).

Fixes Ticket2048.
(cherry picked from commit c83002a4f8)
This commit is contained in:
Clément Bœsch 2012-12-30 06:53:48 +01:00 committed by Carl Eugen Hoyos
parent 436c011a77
commit 42abae1125
1 changed files with 1 additions and 1 deletions
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libavcodec/ass_split.c
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@ -366,7 +366,7 @@ int ff_ass_split_override_codes(const ASSCodesCallbacks *callbacks, void *priv,
char new_line[2];
int text_len = 0;
while (*buf) {
while (buf && *buf) {
if (text && callbacks->text &&
(sscanf(buf, "\\%1[nN]", new_line) == 1 ||
!strncmp(buf, "{\\", 2))) {