ffmpeg patch to patch 42 to avoid infinite loop

third_party/ffmpeg/patches/to_upstream/48_aac_infinite_loop.patch

Index: third_party/ffmpeg/patches/to_upstream/48_aac_infinite_loop.patch
===================================================================
--- third_party/ffmpeg/patches/to_upstream/48_aac_infinite_loop.patch	(revision 0)
+++ third_party/ffmpeg/patches/to_upstream/48_aac_infinite_loop.patch	(revision 0)
@@ -0,0 +1,13 @@
+Index: patched-ffmpeg-mt/libavcodec/aac.c
+===================================================================
+--- patched-ffmpeg-mt/libavcodec/aac.c	(revision 29964)
++++ patched-ffmpeg-mt/libavcodec/aac.c	(working copy)
+@@ -641,7 +641,7 @@
+             while ((sect_len_incr = get_bits(gb, bits)) == (1 << bits)-1)
+                 sect_len += sect_len_incr;
+             sect_len += sect_len_incr;
+-            if (sect_len > ics->max_sfb || sect_len == 0) {
++            if (sect_len > ics->max_sfb || sect_len == k) {
+                 av_log(ac->avccontext, AV_LOG_ERROR,
+                     "Number of bands (%d) is invalid, limit (%d).\n",
+                     sect_len, ics->max_sfb);