sdp.c: don't pass NULL pointer to log string format (#3757)
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@ -597,8 +597,8 @@ PJ_DEF(pj_status_t) pjmedia_sdp_rtpmap_to_attr(pj_pool_t *pool,
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PJ_ASSERT_RETURN(pool && rtpmap && p_attr, PJ_EINVAL);
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/* Check that mandatory attributes are specified. */
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PJ_ASSERT_RETURN(rtpmap->enc_name.slen && rtpmap->clock_rate,
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PJMEDIA_SDP_EINRTPMAP);
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PJ_ASSERT_RETURN(rtpmap->pt.slen && rtpmap->enc_name.slen &&
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rtpmap->clock_rate, PJMEDIA_SDP_EINRTPMAP);
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attr = PJ_POOL_ALLOC_T(pool, pjmedia_sdp_attr);
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@ -617,7 +617,7 @@ PJ_DEF(pj_status_t) pjmedia_sdp_rtpmap_to_attr(pj_pool_t *pool,
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rtpmap->clock_rate,
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(rtpmap->param.slen ? "/" : ""),
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(int)rtpmap->param.slen,
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rtpmap->param.ptr);
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rtpmap->param.slen ? rtpmap->param.ptr : "");
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if (len < 1 || len >= (int)sizeof(tempbuf))
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return PJMEDIA_SDP_ERTPMAPTOOLONG;
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