avcodec/jpeg2000dec: Check SIZ dimensions to be within the supported range

Fixes potential integer overflows
Fixes: 03e0abe721b1174856d41a1eb5d6a896/signal_sigabrt_7ffff6ae7cc9_3813_e71bf3541abed3ccba031cd5ba0269a4.avi

This fix is choosen to be simple to backport, better solution
for master is planed

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 6ef819c40b)

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

libavcodec/jpeg2000dec.c

@@ -250,6 +250,10 @@ static int get_siz(Jpeg2000DecoderContext *s)
         avpriv_request_sample(s->avctx, "Support for image offsets");
         return AVERROR_PATCHWELCOME;
     }
+    if (s->width > 32768U || s->height > 32768U) {
+        avpriv_request_sample(s->avctx, "Large Dimensions");
+        return AVERROR_PATCHWELCOME;
+    }
 
     if (ncomponents <= 0) {
         av_log(s->avctx, AV_LOG_ERROR, "Invalid number of components: %d\n",