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format_cap.c: Fix CLI "core show channeltype Surrogate" crash.

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* Make ast_format_cap_get_names() NULL tolerant.

ASTERISK-26331 #close
Reported by: CGI.NET

Change-Id: Id67e93936dc8ec2a33a9d33655843d43b59285a3
This commit is contained in:
Richard Mudgett
2016-09-02 11:36:38 -05:00
parent 1bd571ef75
commit 8d1c535bd6
1 changed files with 1 additions and 1 deletions
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2
main/format_cap.c
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@@ -737,7 +737,7 @@ const char *ast_format_cap_get_names(struct ast_format_cap *cap, struct ast_str
ast_str_set(buf, 0, "(");
if (!AST_VECTOR_SIZE(&cap->preference_order)) {
if (!cap || !AST_VECTOR_SIZE(&cap->preference_order)) {
ast_str_append(buf, 0, "nothing)");
return ast_str_buffer(*buf);
}