avcodec/bitstream_filters: check the input argument of av_bsf_get_by_name() for NULL
Fixes crashes like "ffmpeg -h bsf" caused by passing NULL to strcmp() Signed-off-by: James Almer <jamrial@gmail.com> (cherry picked from commit 3258cc6507a2012d54889ce5f8efbde7e81d927d)
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@ -58,6 +58,9 @@ const AVBitStreamFilter *av_bsf_get_by_name(const char *name)
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{
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int i;
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if (!name)
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return NULL;
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for (i = 0; bitstream_filters[i]; i++) {
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const AVBitStreamFilter *f = bitstream_filters[i];
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if (!strcmp(f->name, name))
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