[FFmpeg-devel] [PATCH] avfilter/drawtext: fix memory leak when using "reinit" runtime command

[Steven Zhou]

> Bump

A quick way to demonstrate the memleak:
```
./configure --enable-libfreetype --enable-libfribidi --enable-libfontconfig --enable-libharfbuzz make -j `nproc valgrind --leak-check=full ./ffmpeg -nostdin -y -f lavfi \ -i testsrc=size=640x360:rate=10 -filter_complex \
"[0:v]format=yuv420p,sendcmd=c='0.5 drawtext reinit \\\'text=five\\\'',drawtext=text=zero:\
x=(w-text_w)/2:y=(h-text_h)/2:fontsize=30:fontcolor=white at 0.8[vout]" \ -map "[vout]" -t 1 output.y4m ``` -StevenZ

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